12000210021991 has 2 divisors, whose sum is σ = 12000210021992. Its totient is φ = 12000210021990.

The previous prime is 12000210021937. The next prime is 12000210022027. The reversal of 12000210021991 is 19912001200021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12000210021991 - 2²⁹ = 11999673151079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12000210081991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000105010995 + 6000105010996.

It is an arithmetic number, because the mean of its divisors is an integer number (6000105010996).

Almost surely, 2^{12000210021991} is an apocalyptic number.

12000210021991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000210021991 is an equidigital number, since it uses as much as digits as its factorization.

12000210021991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 12000210021991 in words is "twelve trillion, two hundred ten million, twenty-one thousand, nine hundred ninety-one".