22111312 has 30 divisors (see below), whose sum is σ = 43688858. Its totient is φ = 10840896.

The previous prime is 22111289. The next prime is 22111321. The reversal of 22111312 is 21311122.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 2005056 = 4484^2 + 1416^2 .

It is a super-2 number, since 2×22111312² = 977820236722688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22111292 and 22111301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55498 + ... + 55894.

Almost surely, 2^22111312 is an apocalyptic number.

It is an amenable number.

22111312 is a deficient number, since it is larger than the sum of its proper divisors (21577546).

22111312 is an equidigital number, since it uses as much as digits as its factorization.

22111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 458 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 22111312 is about 4702.2666874604. The cubic root of 22111312 is about 280.6757149460.

Adding to 22111312 its reverse (21311122), we get a palindrome (43422434).

The spelling of 22111312 in words is "twenty-two million, one hundred eleven thousand, three hundred twelve".