202221020120813 has 2 divisors, whose sum is σ = 202221020120814. Its totient is φ = 202221020120812.

The previous prime is 202221020120803. The next prime is 202221020120849. The reversal of 202221020120813 is 318021020122202.

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., 201708080545609 + 512939575204 = 14202397^2 + 716198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202221020120813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202221020120803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110510060406 + 101110510060407.

It is an arithmetic number, because the mean of its divisors is an integer number (101110510060407).

Almost surely, 2^{202221020120813} is an apocalyptic number.

It is an amenable number.

202221020120813 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221020120813 is an equidigital number, since it uses as much as digits as its factorization.

202221020120813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The spelling of 202221020120813 in words is "two hundred two trillion, two hundred twenty-one billion, twenty million, one hundred twenty thousand, eight hundred thirteen".