111312233131 has 6 divisors (see below), whose sum is σ = 122351462996. Its totient is φ = 101192939100.

The previous prime is 111312233099. The next prime is 111312233141. The reversal of 111312233131 is 131332213111.

It is not a de Polignac number, because 111312233131 - 2⁵ = 111312233099 is a prime.

It is a super-2 number, since 2×111312233131² (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 (111312233141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459967785 + ... + 459968026.

Almost surely, 2^111312233131 is an apocalyptic number.

111312233131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111312233131 is a deficient number, since it is larger than the sum of its proper divisors (11039229865).

111312233131 is an equidigital number, since it uses as much as digits as its factorization.

111312233131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919935833 (or 919935822 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

Adding to 111312233131 its reverse (131332213111), we get a palindrome (242644446242).

It can be divided in two parts, 111312 and 233131, that added together give a palindrome (344443).

The spelling of 111312233131 in words is "one hundred eleven billion, three hundred twelve million, two hundred thirty-three thousand, one hundred thirty-one".