123130131021012 has 48 divisors (see below), whose sum is σ = 287993356277760. Its totient is φ = 40944848718048.

The previous prime is 123130131020993. The next prime is 123130131021017. The reversal of 123130131021012 is 210120131031321.

It is a super-2 number, since 2×123130131021012² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123130131021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123130131021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511041123 + ... + 511282005.

It is an arithmetic number, because the mean of its divisors is an integer number (5999861589120).

Almost surely, 2^{123130131021012} is an apocalyptic number.

123130131021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123130131021012 is an abundant number, since it is smaller than the sum of its proper divisors (164863225256748).

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

123130131021012 is a wasteful number, since it uses less digits than its factorization.

123130131021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342972 (or 342970 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 123130131021012 its reverse (210120131031321), we get a palindrome (333250262052333).

The spelling of 123130131021012 in words is "one hundred twenty-three trillion, one hundred thirty billion, one hundred thirty-one million, twenty-one thousand, twelve".