202021211011901 has 2 divisors, whose sum is σ = 202021211011902. Its totient is φ = 202021211011900.

The previous prime is 202021211011871. The next prime is 202021211012011. The reversal of 202021211011901 is 109110112120202.

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., 165106412191876 + 36914798820025 = 12849374^2 + 6075755^2 .

It is a cyclic number.

It is not a de Polignac number, because 202021211011901 - 2¹⁰ = 202021211010877 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 (202021211010901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101010605505950 + 101010605505951.

It is an arithmetic number, because the mean of its divisors is an integer number (101010605505951).

Almost surely, 2^{202021211011901} is an apocalyptic number.

It is an amenable number.

202021211011901 is a deficient number, since it is larger than the sum of its proper divisors (1).

202021211011901 is an equidigital number, since it uses as much as digits as its factorization.

202021211011901 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 23.

The spelling of 202021211011901 in words is "two hundred two trillion, twenty-one billion, two hundred eleven million, eleven thousand, nine hundred one".