12102010111991 has 2 divisors, whose sum is σ = 12102010111992. Its totient is φ = 12102010111990.

The previous prime is 12102010111957. The next prime is 12102010112011. The reversal of 12102010111991 is 19911101020121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12102010111991 - 2³⁸ = 11827132205047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102010111591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051005055995 + 6051005055996.

It is an arithmetic number, because the mean of its divisors is an integer number (6051005055996).

Almost surely, 2^{12102010111991} is an apocalyptic number.

12102010111991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102010111991 is an equidigital number, since it uses as much as digits as its factorization.

12102010111991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 29.

The spelling of 12102010111991 in words is "twelve trillion, one hundred two billion, ten million, one hundred eleven thousand, nine hundred ninety-one".