202113232021 has 4 divisors (see below), whose sum is σ = 210900763872. Its totient is φ = 193325700172.

The previous prime is 202113232007. The next prime is 202113232091. The reversal of 202113232021 is 120232311202.

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 202113232021 - 2¹⁹ = 202112707733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202113232021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202113232091) 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, 4393765891 + ... + 4393765936.

It is an arithmetic number, because the mean of its divisors is an integer number (52725190968).

Almost surely, 2^202113232021 is an apocalyptic number.

It is an amenable number.

202113232021 is a deficient number, since it is larger than the sum of its proper divisors (8787531851).

202113232021 is an equidigital number, since it uses as much as digits as its factorization.

202113232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8787531850.

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

Adding to 202113232021 its reverse (120232311202), we get a palindrome (322345543223).

The spelling of 202113232021 in words is "two hundred two billion, one hundred thirteen million, two hundred thirty-two thousand, twenty-one".