111302011991 has 2 divisors, whose sum is σ = 111302011992. Its totient is φ = 111302011990.

The previous prime is 111302011987. The next prime is 111302011993. The reversal of 111302011991 is 199110203111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111302011991 - 2² = 111302011987 is a prime.

Together with 111302011993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111302011993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55651005995 + 55651005996.

It is an arithmetic number, because the mean of its divisors is an integer number (55651005996).

Almost surely, 2^111302011991 is an apocalyptic number.

111302011991 is a deficient number, since it is larger than the sum of its proper divisors (1).

111302011991 is an equidigital number, since it uses as much as digits as its factorization.

111302011991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 29.

The spelling of 111302011991 in words is "one hundred eleven billion, three hundred two million, eleven thousand, nine hundred ninety-one".