123131240421012 has 36 divisors (see below), whose sum is σ = 321288684685696. Its totient is φ = 39719754974160.

The previous prime is 123131240420971. The next prime is 123131240421017. The reversal of 123131240421012 is 210124042131321.

123131240421012 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 31 + 2 + 404 + 210 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×123131240421012² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131240421017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55166325238 + ... + 55166327469.

Almost surely, 2^{123131240421012} is an apocalyptic number.

123131240421012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123131240421012 is an abundant number, since it is smaller than the sum of its proper divisors (198157444264684).

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

123131240421012 is a wasteful number, since it uses less digits than its factorization.

123131240421012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110332652748 (or 110332652743 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 123131240421012 its reverse (210124042131321), we get a palindrome (333255282552333).

The spelling of 123131240421012 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, two hundred forty million, four hundred twenty-one thousand, twelve".