111001098991 has 2 divisors, whose sum is σ = 111001098992. Its totient is φ = 111001098990.

The previous prime is 111001098979. The next prime is 111001099051. The reversal of 111001098991 is 199890100111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111001098991 - 2⁵ = 111001098959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111001098961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500549495 + 55500549496.

It is an arithmetic number, because the mean of its divisors is an integer number (55500549496).

Almost surely, 2^111001098991 is an apocalyptic number.

111001098991 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001098991 is an equidigital number, since it uses as much as digits as its factorization.

111001098991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 40.

The spelling of 111001098991 in words is "one hundred eleven billion, one million, ninety-eight thousand, nine hundred ninety-one".