12110111019961 has 2 divisors, whose sum is σ = 12110111019962. Its totient is φ = 12110111019960.

The previous prime is 12110111019911. The next prime is 12110111020069. The reversal of 12110111019961 is 16991011101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8378043415225 + 3732067604736 = 2894485^2 + 1931856^2 .

It is a cyclic number.

It is not a de Polignac number, because 12110111019961 - 2⁷ = 12110111019833 is a prime.

It is not a weakly prime, because it can be changed into another prime (12110111019911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055055509980 + 6055055509981.

It is an arithmetic number, because the mean of its divisors is an integer number (6055055509981).

Almost surely, 2^{12110111019961} is an apocalyptic number.

It is an amenable number.

12110111019961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12110111019961 is an equidigital number, since it uses as much as digits as its factorization.

12110111019961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 34.

The spelling of 12110111019961 in words is "twelve trillion, one hundred ten billion, one hundred eleven million, nineteen thousand, nine hundred sixty-one".