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131232101220 = 22325113975647
BaseRepresentation
bin111101000111000001…
…0101111001101100100
3110112201210100110202100
41322032002233031210
54122230404214340
6140142011212100
712324024312123
oct1721602571544
9415653313670
10131232101220
1150723111000
1221525447030
13c4b52284cc
1464ccd93aba
1536310e0830
hex1e8e0af364

131232101220 has 288 divisors, whose sum is σ = 442440101376. Its totient is φ = 31480289280.

The previous prime is 131232101177. The next prime is 131232101267. The reversal of 131232101220 is 22101232131.

131232101220 is a `hidden beast` number, since 1 + 312 + 32 + 101 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131232101193 and 131232101202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23236437 + ... + 23242083.

It is an arithmetic number, because the mean of its divisors is an integer number (1536250352).

Almost surely, 2131232101220 is an apocalyptic number.

131232101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131232101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221220050688).

131232101220 is an abundant number, since it is smaller than the sum of its proper divisors (311208000156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131232101220 is a wasteful number, since it uses less digits than its factorization.

131232101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5792 (or 5765 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131232101220 its reverse (22101232131), we get a palindrome (153333333351).

The spelling of 131232101220 in words is "one hundred thirty-one billion, two hundred thirty-two million, one hundred one thousand, two hundred twenty".