123331421013013 has 4 divisors (see below), whose sum is σ = 124717167316620. Its totient is φ = 121945674709408.

The previous prime is 123331421012959. The next prime is 123331421013049. The reversal of 123331421013013 is 310310124133321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7732303612804 + 115599117400209 = 2780702^2 + 10751703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123331421013013 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 (123331421010013) 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, 692873151670 + ... + 692873151847.

It is an arithmetic number, because the mean of its divisors is an integer number (31179291829155).

Almost surely, 2^{123331421013013} is an apocalyptic number.

It is an amenable number.

123331421013013 is a deficient number, since it is larger than the sum of its proper divisors (1385746303607).

123331421013013 is an equidigital number, since it uses as much as digits as its factorization.

123331421013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385746303606.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 123331421013013 its reverse (310310124133321), we get a palindrome (433641545146334).

The spelling of 123331421013013 in words is "one hundred twenty-three trillion, three hundred thirty-one billion, four hundred twenty-one million, thirteen thousand, thirteen".