202313011021 has 4 divisors (see below), whose sum is σ = 220705102944. Its totient is φ = 183920919100.

The previous prime is 202313010983. The next prime is 202313011039. The reversal of 202313011021 is 120110313202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202313011021 - 2⁹ = 202313010509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202313010986 and 202313011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202313011091) 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, 9196045945 + ... + 9196045966.

It is an arithmetic number, because the mean of its divisors is an integer number (55176275736).

Almost surely, 2^202313011021 is an apocalyptic number.

It is an amenable number.

202313011021 is a deficient number, since it is larger than the sum of its proper divisors (18392091923).

202313011021 is a wasteful number, since it uses less digits than its factorization.

202313011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18392091922.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 202313011021 its reverse (120110313202), we get a palindrome (322423324223).

The spelling of 202313011021 in words is "two hundred two billion, three hundred thirteen million, eleven thousand, twenty-one".