231032201021 has 2 divisors, whose sum is σ = 231032201022. Its totient is φ = 231032201020.

The previous prime is 231032200981. The next prime is 231032201027. The reversal of 231032201021 is 120102230132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231024422500 + 7778521 = 480650^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 231032201021 - 2¹⁴ = 231032184637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231032201027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115516100510 + 115516100511.

It is an arithmetic number, because the mean of its divisors is an integer number (115516100511).

Almost surely, 2^231032201021 is an apocalyptic number.

It is an amenable number.

231032201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

231032201021 is an equidigital number, since it uses as much as digits as its factorization.

231032201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 231032201021 its reverse (120102230132), we get a palindrome (351134431153).

The spelling of 231032201021 in words is "two hundred thirty-one billion, thirty-two million, two hundred one thousand, twenty-one".