111301230991 has 2 divisors, whose sum is σ = 111301230992. Its totient is φ = 111301230990.

The previous prime is 111301230977. The next prime is 111301231009. The reversal of 111301230991 is 199032103111.

It is a weak prime.

It is an emirp because it is prime and its reverse (199032103111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111301230991 - 2²⁷ = 111167013263 is a prime.

It is a super-2 number, since 2×111301230991² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111301233991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55650615495 + 55650615496.

It is an arithmetic number, because the mean of its divisors is an integer number (55650615496).

Almost surely, 2^111301230991 is an apocalyptic number.

111301230991 is a deficient number, since it is larger than the sum of its proper divisors (1).

111301230991 is an equidigital number, since it uses as much as digits as its factorization.

111301230991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 111301230991 in words is "one hundred eleven billion, three hundred one million, two hundred thirty thousand, nine hundred ninety-one".