231111222122 has 64 divisors (see below), whose sum is σ = 389934673920. Its totient is φ = 101843592000.

The previous prime is 231111222101. The next prime is 231111222179. The reversal of 231111222122 is 221222111132.

It is a junction number, because it is equal to n+sod(n) for n = 231111222094 and 231111222103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34475423 + ... + 34482125.

It is an arithmetic number, because the mean of its divisors is an integer number (6092729280).

Almost surely, 2^231111222122 is an apocalyptic number.

231111222122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231111222122 is a deficient number, since it is larger than the sum of its proper divisors (158823451798).

231111222122 is a wasteful number, since it uses less digits than its factorization.

231111222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139.

The product of its digits is 192, while the sum is 20.

Adding to 231111222122 its reverse (221222111132), we get a palindrome (452333333254).

The spelling of 231111222122 in words is "two hundred thirty-one billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty-two".