123431421012400 has 120 divisors (see below), whose sum is σ = 315182167089920. Its totient is φ = 46319895256320.

The previous prime is 123431421012349. The next prime is 123431421012433. The reversal of 123431421012400 is 4210124134321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78056892 + ... + 79622491.

Almost surely, 2^{123431421012400} is an apocalyptic number.

123431421012400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123431421012400 is an abundant number, since it is smaller than the sum of its proper divisors (191750746077520).

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

123431421012400 is a wasteful number, since it uses less digits than its factorization.

123431421012400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157679523 (or 157679512 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 123431421012400 its reverse (4210124134321), we get a palindrome (127641545146721).

The spelling of 123431421012400 in words is "one hundred twenty-three trillion, four hundred thirty-one billion, four hundred twenty-one million, twelve thousand, four hundred".