123012204542113 has 16 divisors (see below), whose sum is σ = 130734110322000. Its totient is φ = 115344298156032.

The previous prime is 123012204542057. The next prime is 123012204542137. The reversal of 123012204542113 is 311245402210321.

It can be written as a sum of positive squares in 8 ways, for example, as 6680276052129 + 116331928489984 = 2584623^2 + 10785728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123012204542113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123012204552113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522251473 + ... + 522486961.

It is an arithmetic number, because the mean of its divisors is an integer number (8170881895125).

Almost surely, 2^{123012204542113} is an apocalyptic number.

It is an amenable number.

123012204542113 is a deficient number, since it is larger than the sum of its proper divisors (7721905779887).

123012204542113 is a wasteful number, since it uses less digits than its factorization.

123012204542113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350004.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 123012204542113 its reverse (311245402210321), we get a palindrome (434257606752434).

The spelling of 123012204542113 in words is "one hundred twenty-three trillion, twelve billion, two hundred four million, five hundred forty-two thousand, one hundred thirteen".