31202213131013 has 4 divisors (see below), whose sum is σ = 31203068655468. Its totient is φ = 31201357606560.

The previous prime is 31202213131007. The next prime is 31202213131027. The reversal of 31202213131013 is 31013131220213.

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 4811872185604 + 26390340945409 = 2193598^2 + 5137153^2 .

It is a cyclic number.

It is not a de Polignac number, because 31202213131013 - 2⁸ = 31202213130757 is a prime.

It is a super-3 number, since 3×31202213131013³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31202213131013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202213131043) 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, 427707518 + ... + 427780463.

It is an arithmetic number, because the mean of its divisors is an integer number (7800767163867).

Almost surely, 2^{31202213131013} is an apocalyptic number.

It is an amenable number.

31202213131013 is a deficient number, since it is larger than the sum of its proper divisors (855524455).

31202213131013 is an equidigital number, since it uses as much as digits as its factorization.

31202213131013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855524454.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31202213131013 its reverse (31013131220213), we get a palindrome (62215344351226).

The spelling of 31202213131013 in words is "thirty-one trillion, two hundred two billion, two hundred thirteen million, one hundred thirty-one thousand, thirteen".