231304120421 has 12 divisors (see below), whose sum is σ = 254313343200. Its totient is φ = 210218602440.

The previous prime is 231304120391. The next prime is 231304120457. The reversal of 231304120421 is 124021403132.

It is a de Polignac number, because none of the positive numbers 2^k-231304120421 is a prime.

It is a super-2 number, since 2×231304120421² (a number of 24 digits) contains 22 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 (231304128421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181520 + ... + 703958.

It is an arithmetic number, because the mean of its divisors is an integer number (21192778600).

Almost surely, 2^231304120421 is an apocalyptic number.

It is an amenable number.

231304120421 is a deficient number, since it is larger than the sum of its proper divisors (23009222779).

231304120421 is a wasteful number, since it uses less digits than its factorization.

231304120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526120 (or 526109 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 231304120421 its reverse (124021403132), we get a palindrome (355325523553).

The spelling of 231304120421 in words is "two hundred thirty-one billion, three hundred four million, one hundred twenty thousand, four hundred twenty-one".