123421231222013 has 8 divisors (see below), whose sum is σ = 127837332929880. Its totient is φ = 119015809326400.

The previous prime is 123421231221971. The next prime is 123421231222027. The reversal of 123421231222013 is 310222132124321.

It can be written as a sum of positive squares in 4 ways, for example, as 36571748261764 + 86849482960249 = 6047458^2 + 9319307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123421231222013 - 2²⁸ = 123420962786557 is a prime.

It is a super-3 number, since 3×123421231222013³ (a number of 43 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421231228013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669929538 + ... + 2669975763.

It is an arithmetic number, because the mean of its divisors is an integer number (15979666616235).

Almost surely, 2^{123421231222013} is an apocalyptic number.

It is an amenable number.

123421231222013 is a deficient number, since it is larger than the sum of its proper divisors (4416101707867).

123421231222013 is an equidigital number, since it uses as much as digits as its factorization.

123421231222013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339906127.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 123421231222013 its reverse (310222132124321), we get a palindrome (433643363346334).

The spelling of 123421231222013 in words is "one hundred twenty-three trillion, four hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, thirteen".