231333031120021 has 4 divisors (see below), whose sum is σ = 231340780740544. Its totient is φ = 231325281499500.

The previous prime is 231333031120019. The next prime is 231333031120031. The reversal of 231333031120021 is 120021130333132.

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 231333031120021 - 2¹ = 231333031120019 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 (231333031120031) 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, 3874765485 + ... + 3874825186.

It is an arithmetic number, because the mean of its divisors is an integer number (57835195185136).

Almost surely, 2^{231333031120021} is an apocalyptic number.

It is an amenable number.

231333031120021 is a deficient number, since it is larger than the sum of its proper divisors (7749620523).

231333031120021 is an equidigital number, since it uses as much as digits as its factorization.

231333031120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7749620522.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 231333031120021 its reverse (120021130333132), we get a palindrome (351354161453153).

The spelling of 231333031120021 in words is "two hundred thirty-one trillion, three hundred thirty-three billion, thirty-one million, one hundred twenty thousand, twenty-one".