123313310253421 has 4 divisors (see below), whose sum is σ = 123447492311200. Its totient is φ = 123179128195644.

The previous prime is 123313310253383. The next prime is 123313310253457. The reversal of 123313310253421 is 124352013313321.

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 123313310253421 - 2¹⁹ = 123313309729133 is a prime.

It is a super-5 number, since 5×123313310253421⁵ (a number of 72 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123313310253461) 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, 67091027511 + ... + 67091029348.

It is an arithmetic number, because the mean of its divisors is an integer number (30861873077800).

Almost surely, 2^{123313310253421} is an apocalyptic number.

It is an amenable number.

123313310253421 is a deficient number, since it is larger than the sum of its proper divisors (134182057779).

123313310253421 is an equidigital number, since it uses as much as digits as its factorization.

123313310253421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134182057778.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 123313310253421 its reverse (124352013313321), we get a palindrome (247665323566742).

The spelling of 123313310253421 in words is "one hundred twenty-three trillion, three hundred thirteen billion, three hundred ten million, two hundred fifty-three thousand, four hundred twenty-one".