111630131 has 2 divisors, whose sum is σ = 111630132. Its totient is φ = 111630130.

The previous prime is 111630091. The next prime is 111630133. The reversal of 111630131 is 131036111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111630131 is a prime.

It is a super-2 number, since 2×111630131² = 24922572294154322, which contains 22 as substring.

Together with 111630133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111630133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55815065 + 55815066.

It is an arithmetic number, because the mean of its divisors is an integer number (55815066).

Almost surely, 2^111630131 is an apocalyptic number.

111630131 is a deficient number, since it is larger than the sum of its proper divisors (1).

111630131 is an equidigital number, since it uses as much as digits as its factorization.

111630131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 111630131 is about 10565.5161255852. The cubic root of 111630131 is about 481.4972504495.

Adding to 111630131 its reverse (131036111), we get a palindrome (242666242).

The spelling of 111630131 in words is "one hundred eleven million, six hundred thirty thousand, one hundred thirty-one".