202010023201991 has 2 divisors, whose sum is σ = 202010023201992. Its totient is φ = 202010023201990.

The previous prime is 202010023201963. The next prime is 202010023202017. The reversal of 202010023201991 is 199102320010202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202010023201991 - 2¹⁰ = 202010023200967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202010023201901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101005011600995 + 101005011600996.

It is an arithmetic number, because the mean of its divisors is an integer number (101005011600996).

Almost surely, 2^{202010023201991} is an apocalyptic number.

202010023201991 is a deficient number, since it is larger than the sum of its proper divisors (1).

202010023201991 is an equidigital number, since it uses as much as digits as its factorization.

202010023201991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 202010023201991 in words is "two hundred two trillion, ten billion, twenty-three million, two hundred one thousand, nine hundred ninety-one".