12220011201991 has 2 divisors, whose sum is σ = 12220011201992. Its totient is φ = 12220011201990.

The previous prime is 12220011201973. The next prime is 12220011202043. The reversal of 12220011201991 is 19910211002221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12220011201991 - 2⁷ = 12220011201863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220011201091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110005600995 + 6110005600996.

It is an arithmetic number, because the mean of its divisors is an integer number (6110005600996).

Almost surely, 2^{12220011201991} is an apocalyptic number.

12220011201991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220011201991 is an equidigital number, since it uses as much as digits as its factorization.

12220011201991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 12220011201991 in words is "twelve trillion, two hundred twenty billion, eleven million, two hundred one thousand, nine hundred ninety-one".