202131223021 has 16 divisors (see below), whose sum is σ = 250424435968. Its totient is φ = 158868864000.

The previous prime is 202131223009. The next prime is 202131223051. The reversal of 202131223021 is 120322131202.

It is not a de Polignac number, because 202131223021 - 2⁷ = 202131222893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202131223021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202131223001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7341300 + ... + 7368781.

It is an arithmetic number, because the mean of its divisors is an integer number (15651527248).

Almost surely, 2^202131223021 is an apocalyptic number.

It is an amenable number.

202131223021 is a deficient number, since it is larger than the sum of its proper divisors (48293212947).

202131223021 is a wasteful number, since it uses less digits than its factorization.

202131223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14710252.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 202131223021 its reverse (120322131202), we get a palindrome (322453354223).

The spelling of 202131223021 in words is "two hundred two billion, one hundred thirty-one million, two hundred twenty-three thousand, twenty-one".