111123030131 has 2 divisors, whose sum is σ = 111123030132. Its totient is φ = 111123030130.

The previous prime is 111123030107. The next prime is 111123030181. The reversal of 111123030131 is 131030321111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111123030131 is a prime.

It is a super-2 number, since 2×111123030131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111123030181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561515065 + 55561515066.

It is an arithmetic number, because the mean of its divisors is an integer number (55561515066).

Almost surely, 2^111123030131 is an apocalyptic number.

111123030131 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123030131 is an equidigital number, since it uses as much as digits as its factorization.

111123030131 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.

Adding to 111123030131 its reverse (131030321111), we get a palindrome (242153351242).

The spelling of 111123030131 in words is "one hundred eleven billion, one hundred twenty-three million, thirty thousand, one hundred thirty-one".