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131021212310 = 2513102121231
BaseRepresentation
bin111101000000101111…
…0010000101010010110
3110112012002112012112222
41322001132100222112
54121312412243220
6140105035142342
712315553633502
oct1720136205226
9415162465488
10131021212310
115062507104a
12214868a49b2
13c48062ab81
1464acd79302
15361c834e25
hex1e81790a96

131021212310 has 8 divisors (see below), whose sum is σ = 235838182176. Its totient is φ = 52408484920.

The previous prime is 131021212297. The next prime is 131021212369. The reversal of 131021212310 is 13212120131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1310212123102 (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6551060606 + ... + 6551060625.

It is an arithmetic number, because the mean of its divisors is an integer number (29479772772).

Almost surely, 2131021212310 is an apocalyptic number.

131021212310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131021212310 is a deficient number, since it is larger than the sum of its proper divisors (104816969866).

131021212310 is a wasteful number, since it uses less digits than its factorization.

131021212310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13102121238.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131021212310 its reverse (13212120131), we get a palindrome (144233332441).

The spelling of 131021212310 in words is "one hundred thirty-one billion, twenty-one million, two hundred twelve thousand, three hundred ten".

Divisors: 1 2 5 10 13102121231 26204242462 65510606155 131021212310