123261045042000 has 80 divisors (see below), whose sum is σ = 397393609234752. Its totient is φ = 32869612009600.

The previous prime is 123261045041989. The next prime is 123261045042043. The reversal of 123261045042000 is 240540162321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10271747754 + ... + 10271759753.

Almost surely, 2^{123261045042000} is an apocalyptic number.

123261045042000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123261045042000 is an abundant number, since it is smaller than the sum of its proper divisors (274132564192752).

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

123261045042000 is a wasteful number, since it uses less digits than its factorization.

123261045042000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20543507533 (or 20543507517 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 123261045042000 in words is "one hundred twenty-three trillion, two hundred sixty-one billion, forty-five million, forty-two thousand".