111100051591 has 2 divisors, whose sum is σ = 111100051592. Its totient is φ = 111100051590.

The previous prime is 111100051577. The next prime is 111100051613. The reversal of 111100051591 is 195150001111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111100051591 - 2¹⁹ = 111099527303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111100051571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550025795 + 55550025796.

It is an arithmetic number, because the mean of its divisors is an integer number (55550025796).

Almost surely, 2^111100051591 is an apocalyptic number.

111100051591 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100051591 is an equidigital number, since it uses as much as digits as its factorization.

111100051591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 25.

The spelling of 111100051591 in words is "one hundred eleven billion, one hundred million, fifty-one thousand, five hundred ninety-one".