111112110111997 has 2 divisors, whose sum is σ = 111112110111998. Its totient is φ = 111112110111996.

The previous prime is 111112110111967. The next prime is 111112110112021. The reversal of 111112110111997 is 799111011211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79573429115236 + 31538680996761 = 8920394^2 + 5615931^2 .

It is a cyclic number.

It is not a de Polignac number, because 111112110111997 - 2⁴³ = 102316017089789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111112110111967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556055055998 + 55556055055999.

It is an arithmetic number, because the mean of its divisors is an integer number (55556055055999).

Almost surely, 2^{111112110111997} is an apocalyptic number.

It is an amenable number.

111112110111997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112110111997 is an equidigital number, since it uses as much as digits as its factorization.

111112110111997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 37.

The spelling of 111112110111997 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred ten million, one hundred eleven thousand, nine hundred ninety-seven".