202012120099991 has 2 divisors, whose sum is σ = 202012120099992. Its totient is φ = 202012120099990.

The previous prime is 202012120099987. The next prime is 202012120100039. The reversal of 202012120099991 is 199990021210202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202012120099991 - 2² = 202012120099987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202012120099921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101006060049995 + 101006060049996.

It is an arithmetic number, because the mean of its divisors is an integer number (101006060049996).

Almost surely, 2^{202012120099991} is an apocalyptic number.

202012120099991 is a deficient number, since it is larger than the sum of its proper divisors (1).

202012120099991 is an equidigital number, since it uses as much as digits as its factorization.

202012120099991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 202012120099991 in words is "two hundred two trillion, twelve billion, one hundred twenty million, ninety-nine thousand, nine hundred ninety-one".