231332312020021 has 32 divisors (see below), whose sum is σ = 244519608453120. Its totient is φ = 218247894547200.

The previous prime is 231332312019997. The next prime is 231332312020027. The reversal of 231332312020021 is 120020213233132.

It is a cyclic number.

It is not a de Polignac number, because 231332312020021 - 2¹⁵ = 231332311987253 is a prime.

It is a super-3 number, since 3×231332312020021³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231332312020027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37731576126 + ... + 37731582256.

It is an arithmetic number, because the mean of its divisors is an integer number (7641237764160).

Almost surely, 2^{231332312020021} is an apocalyptic number.

It is an amenable number.

231332312020021 is a deficient number, since it is larger than the sum of its proper divisors (13187296433099).

231332312020021 is a wasteful number, since it uses less digits than its factorization.

231332312020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12505.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 231332312020021 its reverse (120020213233132), we get a palindrome (351352525253153).

The spelling of 231332312020021 in words is "two hundred thirty-one trillion, three hundred thirty-two billion, three hundred twelve million, twenty thousand, twenty-one".