11112111031 has 12 divisors (see below), whose sum is σ = 13403134992. Its totient is φ = 9023366304.

The previous prime is 11112111011. The next prime is 11112111061. The reversal of 11112111031 is 13011121111.

It is not a de Polignac number, because 11112111031 - 2⁷ = 11112110903 is a prime.

It is a super-2 number, since 2×11112111031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112111011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2196150 + ... + 2201203.

It is an arithmetic number, because the mean of its divisors is an integer number (1116927916).

Almost surely, 2^11112111031 is an apocalyptic number.

11112111031 is a deficient number, since it is larger than the sum of its proper divisors (2291023961).

11112111031 is an equidigital number, since it uses as much as digits as its factorization.

11112111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397398 (or 4397379 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11112111031 its reverse (13011121111), we get a palindrome (24123232142).

The spelling of 11112111031 in words is "eleven billion, one hundred twelve million, one hundred eleven thousand, thirty-one".