11111200110991 has 2 divisors, whose sum is σ = 11111200110992. Its totient is φ = 11111200110990.

The previous prime is 11111200110943. The next prime is 11111200111013. The reversal of 11111200110991 is 19901100211111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111200110991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111200110911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555600055495 + 5555600055496.

It is an arithmetic number, because the mean of its divisors is an integer number (5555600055496).

Almost surely, 2^{11111200110991} is an apocalyptic number.

11111200110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111200110991 is an equidigital number, since it uses as much as digits as its factorization.

11111200110991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 28.

The spelling of 11111200110991 in words is "eleven trillion, one hundred eleven billion, two hundred million, one hundred ten thousand, nine hundred ninety-one".