202321012013 has 4 divisors (see below), whose sum is σ = 204406795740. Its totient is φ = 200235228288.

The previous prime is 202321011979. The next prime is 202321012031. The reversal of 202321012013 is 310210123202.

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 134251158409 + 68069853604 = 366403^2 + 260902^2 .

It is not a de Polignac number, because 202321012013 - 2²⁰ = 202319963437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202321011982 and 202321012000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202321012063) 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, 1042891718 + ... + 1042891911.

It is an arithmetic number, because the mean of its divisors is an integer number (51101698935).

Almost surely, 2^202321012013 is an apocalyptic number.

It is an amenable number.

202321012013 is a deficient number, since it is larger than the sum of its proper divisors (2085783727).

202321012013 is an equidigital number, since it uses as much as digits as its factorization.

202321012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085783726.

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

Adding to 202321012013 its reverse (310210123202), we get a palindrome (512531135215).

The spelling of 202321012013 in words is "two hundred two billion, three hundred twenty-one million, twelve thousand, thirteen".