111302981 has 2 divisors, whose sum is σ = 111302982. Its totient is φ = 111302980.

The previous prime is 111302977. The next prime is 111303001. The reversal of 111302981 is 189203111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90060100 + 21242881 = 9490^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 111302981 - 2² = 111302977 is a prime.

It is a super-2 number, since 2×111302981² = 24776707158972722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111302981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111302921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55651490 + 55651491.

It is an arithmetic number, because the mean of its divisors is an integer number (55651491).

Almost surely, 2^111302981 is an apocalyptic number.

It is an amenable number.

111302981 is a deficient number, since it is larger than the sum of its proper divisors (1).

111302981 is an equidigital number, since it uses as much as digits as its factorization.

111302981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 111302981 is about 10550.0227961839. The cubic root of 111302981 is about 481.0264219014.

The spelling of 111302981 in words is "one hundred eleven million, three hundred two thousand, nine hundred eighty-one".