202321300021 has 2 divisors, whose sum is σ = 202321300022. Its totient is φ = 202321300020.

The previous prime is 202321299989. The next prime is 202321300039. The reversal of 202321300021 is 120003123202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124175892996 + 78145407025 = 352386^2 + 279545^2 .

It is a cyclic number.

It is not a de Polignac number, because 202321300021 - 2⁵ = 202321299989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202321299968 and 202321300004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202321300061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101160650010 + 101160650011.

It is an arithmetic number, because the mean of its divisors is an integer number (101160650011).

Almost surely, 2^202321300021 is an apocalyptic number.

It is an amenable number.

202321300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202321300021 is an equidigital number, since it uses as much as digits as its factorization.

202321300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 202321300021 its reverse (120003123202), we get a palindrome (322324423223).

The spelling of 202321300021 in words is "two hundred two billion, three hundred twenty-one million, three hundred thousand, twenty-one".