102012122110991 has 2 divisors, whose sum is σ = 102012122110992. Its totient is φ = 102012122110990.

The previous prime is 102012122110981. The next prime is 102012122111017. The reversal of 102012122110991 is 199011221210201.

It is a weak prime.

It is an emirp because it is prime and its reverse (199011221210201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102012122110991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102012122110901) 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, 51006061055495 + 51006061055496.

It is an arithmetic number, because the mean of its divisors is an integer number (51006061055496).

Almost surely, 2^{102012122110991} is an apocalyptic number.

102012122110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012122110991 is an equidigital number, since it uses as much as digits as its factorization.

102012122110991 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 32.

The spelling of 102012122110991 in words is "one hundred two trillion, twelve billion, one hundred twenty-two million, one hundred ten thousand, nine hundred ninety-one".