123131310000000 has 512 divisors, whose sum is σ = 409349256750720. Its totient is φ = 32793600000000.

The previous prime is 123131309999977. The next prime is 123131310000043. The reversal of 123131310000000 is 13131321.

It is a super-2 number, since 2×123131310000000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 29309997900 + ... + 29310002100.

Almost surely, 2^{123131310000000} is an apocalyptic number.

123131310000000 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 123131310000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204674628375360).

123131310000000 is an abundant number, since it is smaller than the sum of its proper divisors (286217946750720).

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

123131310000000 is an frugal number, since it uses more digits than its factorization.

123131310000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5230 (or 5188 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 123131310000000 its reverse (13131321), we get a palindrome (123131323131321).

The spelling of 123131310000000 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, three hundred ten million", and thus it is an aban number.