111312331331 has 4 divisors (see below), whose sum is σ = 111410926200. Its totient is φ = 111213736464.

The previous prime is 111312331309. The next prime is 111312331373. The reversal of 111312331331 is 133133213111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133133213111 = 89 ⋅1495878799.

It is a cyclic number.

It is not a de Polignac number, because 111312331331 - 2⁶ = 111312331267 is a prime.

It is a super-2 number, since 2×111312331331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111312331297 and 111312331306.

It is not an unprimeable number, because it can be changed into a prime (111312331301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49295741 + ... + 49297998.

It is an arithmetic number, because the mean of its divisors is an integer number (27852731550).

Almost surely, 2^111312331331 is an apocalyptic number.

111312331331 is a deficient number, since it is larger than the sum of its proper divisors (98594869).

111312331331 is an equidigital number, since it uses as much as digits as its factorization.

111312331331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98594868.

The product of its digits is 486, while the sum is 23.

Adding to 111312331331 its reverse (133133213111), we get a palindrome (244445544442).

The spelling of 111312331331 in words is "one hundred eleven billion, three hundred twelve million, three hundred thirty-one thousand, three hundred thirty-one".