111312031331 has 4 divisors (see below), whose sum is σ = 112836853752. Its totient is φ = 109787208912.

The previous prime is 111312031301. The next prime is 111312031349. The reversal of 111312031331 is 133130213111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133130213111 = 7 ⋅19018601873.

It is a cyclic number.

It is not a de Polignac number, because 111312031331 - 2²² = 111307837027 is a prime.

It is a super-2 number, since 2×111312031331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111312031301) 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, 762411101 + ... + 762411246.

It is an arithmetic number, because the mean of its divisors is an integer number (28209213438).

Almost surely, 2^111312031331 is an apocalyptic number.

111312031331 is a deficient number, since it is larger than the sum of its proper divisors (1524822421).

111312031331 is an equidigital number, since it uses as much as digits as its factorization.

111312031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524822420.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 111312031331 its reverse (133130213111), we get a palindrome (244442244442).

The spelling of 111312031331 in words is "one hundred eleven billion, three hundred twelve million, thirty-one thousand, three hundred thirty-one".