111110999999977 has 2 divisors, whose sum is σ = 111110999999978. Its totient is φ = 111110999999976.

The previous prime is 111110999999953. The next prime is 111111000000031. The reversal of 111110999999977 is 779999999011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108606807688681 + 2504192311296 = 10421459^2 + 1582464^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110999999977 - 2⁷ = 111110999999849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111110999999977.

It is not a weakly prime, because it can be changed into another prime (111110999999917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555499999988 + 55555499999989.

It is an arithmetic number, because the mean of its divisors is an integer number (55555499999989).

Almost surely, 2^{111110999999977} is an apocalyptic number.

It is an amenable number.

111110999999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110999999977 is an equidigital number, since it uses as much as digits as its factorization.

111110999999977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 234365481, while the sum is 82.

The spelling of 111110999999977 in words is "one hundred eleven trillion, one hundred ten billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-seven".