12000221220991 has 2 divisors, whose sum is σ = 12000221220992. Its totient is φ = 12000221220990.

The previous prime is 12000221220971. The next prime is 12000221221081. The reversal of 12000221220991 is 19902212200021.

12000221220991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12000221220991 - 2⁵ = 12000221220959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12000221220931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000110610495 + 6000110610496.

It is an arithmetic number, because the mean of its divisors is an integer number (6000110610496).

Almost surely, 2^{12000221220991} is an apocalyptic number.

12000221220991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12000221220991 is an equidigital number, since it uses as much as digits as its factorization.

12000221220991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 12000221220991 in words is "twelve trillion, two hundred twenty-one million, two hundred twenty thousand, nine hundred ninety-one".