123311020144 has 40 divisors (see below), whose sum is σ = 258360897872. Its totient is φ = 56676602880.

The previous prime is 123311020139. The next prime is 123311020159. The reversal of 123311020144 is 441020113321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1179834 + ... + 1280089.

Almost surely, 2^123311020144 is an apocalyptic number.

It is an amenable number.

123311020144 is an abundant number, since it is smaller than the sum of its proper divisors (135049877728).

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

123311020144 is a wasteful number, since it uses less digits than its factorization.

123311020144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460185 (or 2460179 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 123311020144 its reverse (441020113321), we get a palindrome (564331133465).

The spelling of 123311020144 in words is "one hundred twenty-three billion, three hundred eleven million, twenty thousand, one hundred forty-four".