123121313043400 has 96 divisors (see below), whose sum is σ = 327198473403840. Its totient is φ = 42206885372160.

The previous prime is 123121313043389. The next prime is 123121313043433. The reversal of 123121313043400 is 4340313121321.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 3247722 + ... + 16024678.

It is an arithmetic number, because the mean of its divisors is an integer number (3408317431290).

Almost surely, 2^{123121313043400} is an apocalyptic number.

123121313043400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123121313043400 is an abundant number, since it is smaller than the sum of its proper divisors (204077160360440).

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

123121313043400 is a wasteful number, since it uses less digits than its factorization.

123121313043400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12783863 (or 12783854 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 123121313043400 its reverse (4340313121321), we get a palindrome (127461626164721).

The spelling of 123121313043400 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, three hundred thirteen million, forty-three thousand, four hundred".