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131231320230120 = 233511317940595209
BaseRepresentation
bin11101110101101010101100…
…001110011100100011101000
3122012122120222100020221101020
4131311222230032130203220
5114200043220434330440
61143034500343452440
736433102311031665
oct3565525416344350
9565576870227336
10131231320230120
11388a5988092820
1212875613757120
13582c0a2904026
1424598b61daa6c
151028963c473d0
hex775aac39c8e8

131231320230120 has 256 divisors, whose sum is σ = 448950546432000. Its totient is φ = 30397691750400.

The previous prime is 131231320230077. The next prime is 131231320230169. The reversal of 131231320230120 is 21032023132131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17064925 + ... + 23530284.

It is an arithmetic number, because the mean of its divisors is an integer number (1753713072000).

Almost surely, 2131231320230120 is an apocalyptic number.

131231320230120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131231320230120 is an abundant number, since it is smaller than the sum of its proper divisors (317719226201880).

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

131231320230120 is a wasteful number, since it uses less digits than its factorization.

131231320230120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40595344 (or 40595340 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 131231320230120 its reverse (21032023132131), we get a palindrome (152263343362251).

The spelling of 131231320230120 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, two hundred thirty thousand, one hundred twenty".