123051142013021 has 4 divisors (see below), whose sum is σ = 123051300980544. Its totient is φ = 123050983045500.

The previous prime is 123051142012993. The next prime is 123051142013029. The reversal of 123051142013021 is 120310241150321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123051142013021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123051142013029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78316955 + ... + 79872696.

It is an arithmetic number, because the mean of its divisors is an integer number (30762825245136).

Almost surely, 2^{123051142013021} is an apocalyptic number.

It is an amenable number.

123051142013021 is a deficient number, since it is larger than the sum of its proper divisors (158967523).

123051142013021 is an equidigital number, since it uses as much as digits as its factorization.

123051142013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158967522.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 123051142013021 its reverse (120310241150321), we get a palindrome (243361383163342).

The spelling of 123051142013021 in words is "one hundred twenty-three trillion, fifty-one billion, one hundred forty-two million, thirteen thousand, twenty-one".