111131212122 has 24 divisors (see below), whose sum is σ = 275182049376. Its totient is φ = 31751774856.

The previous prime is 111131212111. The next prime is 111131212123. The reversal of 111131212122 is 221212131111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 111131212095 and 111131212104.

It is not an unprimeable number, because it can be changed into a prime (111131212123) 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, 440996748 + ... + 440996999.

It is an arithmetic number, because the mean of its divisors is an integer number (11465918724).

Almost surely, 2^111131212122 is an apocalyptic number.

111131212122 is an abundant number, since it is smaller than the sum of its proper divisors (164050837254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111131212122 is a wasteful number, since it uses less digits than its factorization.

111131212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881993762 (or 881993759 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 111131212122 its reverse (221212131111), we get a palindrome (332343343233).

The spelling of 111131212122 in words is "one hundred eleven billion, one hundred thirty-one million, two hundred twelve thousand, one hundred twenty-two".