202310212021 has 2 divisors, whose sum is σ = 202310212022. Its totient is φ = 202310212020.

The previous prime is 202310212009. The next prime is 202310212051. The reversal of 202310212021 is 120212013202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200798091025 + 1512120996 = 448105^2 + 38886^2 .

It is a cyclic number.

It is not a de Polignac number, because 202310212021 - 2¹⁹ = 202309687733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202310211986 and 202310212004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202310212051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101155106010 + 101155106011.

It is an arithmetic number, because the mean of its divisors is an integer number (101155106011).

Almost surely, 2^202310212021 is an apocalyptic number.

It is an amenable number.

202310212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202310212021 is an equidigital number, since it uses as much as digits as its factorization.

202310212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202310212021 its reverse (120212013202), we get a palindrome (322522225223).

The spelling of 202310212021 in words is "two hundred two billion, three hundred ten million, two hundred twelve thousand, twenty-one".