111020997959 has 2 divisors, whose sum is σ = 111020997960. Its totient is φ = 111020997958.

The previous prime is 111020997943. The next prime is 111020997991. The reversal of 111020997959 is 959799020111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111020997959 - 2⁴ = 111020997943 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111020997959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111020927959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510498979 + 55510498980.

It is an arithmetic number, because the mean of its divisors is an integer number (55510498980).

Almost surely, 2^111020997959 is an apocalyptic number.

111020997959 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020997959 is an equidigital number, since it uses as much as digits as its factorization.

111020997959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 459270, while the sum is 53.

The spelling of 111020997959 in words is "one hundred eleven billion, twenty million, nine hundred ninety-seven thousand, nine hundred fifty-nine".