111551035997 has 2 divisors, whose sum is σ = 111551035998. Its totient is φ = 111551035996.

The previous prime is 111551035987. The next prime is 111551036011. The reversal of 111551035997 is 799530155111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57974526841 + 53576509156 = 240779^2 + 231466^2 .

It is a cyclic number.

It is not a de Polignac number, because 111551035997 - 2⁸ = 111551035741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111551035957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55775517998 + 55775517999.

It is an arithmetic number, because the mean of its divisors is an integer number (55775517999).

Almost surely, 2^111551035997 is an apocalyptic number.

It is an amenable number.

111551035997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111551035997 is an equidigital number, since it uses as much as digits as its factorization.

111551035997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 212625, while the sum is 47.

The spelling of 111551035997 in words is "one hundred eleven billion, five hundred fifty-one million, thirty-five thousand, nine hundred ninety-seven".