202131020312213 has 4 divisors (see below), whose sum is σ = 202131068646348. Its totient is φ = 202130971978080.

The previous prime is 202131020312189. The next prime is 202131020312231. The reversal of 202131020312213 is 312213020131202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60308239842244 + 141822780469969 = 7765838^2 + 11908937^2 .

It is a cyclic number.

It is not a de Polignac number, because 202131020312213 - 2¹² = 202131020308117 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 (202131020312413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17230478 + ... + 26479263.

It is an arithmetic number, because the mean of its divisors is an integer number (50532767161587).

Almost surely, 2^{202131020312213} is an apocalyptic number.

It is an amenable number.

202131020312213 is a deficient number, since it is larger than the sum of its proper divisors (48334135).

202131020312213 is an equidigital number, since it uses as much as digits as its factorization.

202131020312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48334134.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 202131020312213 its reverse (312213020131202), we get a palindrome (514344040443415).

The spelling of 202131020312213 in words is "two hundred two trillion, one hundred thirty-one billion, twenty million, three hundred twelve thousand, two hundred thirteen".