123121310353204 has 12 divisors (see below), whose sum is σ = 222412689670528. Its totient is φ = 59574827590200.

The previous prime is 123121310353177. The next prime is 123121310353213. The reversal of 123121310353204 is 402353013121321.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 496456896462 + ... + 496456896709.

Almost surely, 2^{123121310353204} is an apocalyptic number.

It is an amenable number.

123121310353204 is a deficient number, since it is larger than the sum of its proper divisors (99291379317324).

123121310353204 is a wasteful number, since it uses less digits than its factorization.

123121310353204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992913793206 (or 992913793204 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 123121310353204 its reverse (402353013121321), we get a palindrome (525474323474525).

The spelling of 123121310353204 in words is "one hundred twenty-three trillion, one hundred twenty-one billion, three hundred ten million, three hundred fifty-three thousand, two hundred four".