123411351052021 has 4 divisors (see below), whose sum is σ = 125253311515552. Its totient is φ = 121569390588492.

The previous prime is 123411351052013. The next prime is 123411351052051. The reversal of 123411351052021 is 120250153114321.

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 not a de Polignac number, because 123411351052021 - 2³ = 123411351052013 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 (123411351052051) 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, 920980231665 + ... + 920980231798.

It is an arithmetic number, because the mean of its divisors is an integer number (31313327878888).

Almost surely, 2^{123411351052021} is an apocalyptic number.

It is an amenable number.

123411351052021 is a deficient number, since it is larger than the sum of its proper divisors (1841960463531).

123411351052021 is an equidigital number, since it uses as much as digits as its factorization.

123411351052021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841960463530.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 123411351052021 in words is "one hundred twenty-three trillion, four hundred eleven billion, three hundred fifty-one million, fifty-two thousand, twenty-one".