232304213021 has 4 divisors (see below), whose sum is σ = 239797897344. Its totient is φ = 224810528700.

The previous prime is 232304213017. The next prime is 232304213039. The reversal of 232304213021 is 120312403232.

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 232304213021 - 2² = 232304213017 is a prime.

It is a super-2 number, since 2×232304213021² (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 (232304213081) 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, 3746842115 + ... + 3746842176.

It is an arithmetic number, because the mean of its divisors is an integer number (59949474336).

Almost surely, 2^232304213021 is an apocalyptic number.

It is an amenable number.

232304213021 is a deficient number, since it is larger than the sum of its proper divisors (7493684323).

232304213021 is an equidigital number, since it uses as much as digits as its factorization.

232304213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7493684322.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 232304213021 its reverse (120312403232), we get a palindrome (352616616253).

The spelling of 232304213021 in words is "two hundred thirty-two billion, three hundred four million, two hundred thirteen thousand, twenty-one".