111210311231 has 2 divisors, whose sum is σ = 111210311232. Its totient is φ = 111210311230.

The previous prime is 111210311143. The next prime is 111210311243. The reversal of 111210311231 is 132113012111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111210311231 is a prime.

It is a super-2 number, since 2×111210311231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110210311231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605155615 + 55605155616.

It is an arithmetic number, because the mean of its divisors is an integer number (55605155616).

Almost surely, 2^111210311231 is an apocalyptic number.

111210311231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111210311231 is an equidigital number, since it uses as much as digits as its factorization.

111210311231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111210311231 its reverse (132113012111), we get a palindrome (243323323342).

The spelling of 111210311231 in words is "one hundred eleven billion, two hundred ten million, three hundred eleven thousand, two hundred thirty-one".