1222313111312 has 20 divisors (see below), whose sum is σ = 2392646415516. Its totient is φ = 604855971840.

The previous prime is 1222313111263. The next prime is 1222313111363. The reversal of 1222313111312 is 2131113132221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 173335664896 + 1048977446416 = 416336^2 + 1024196^2 .

It is a super-3 number, since 3×1222313111312³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393784889 + ... + 393787992.

Almost surely, 2^{1222313111312} is an apocalyptic number.

It is an amenable number.

1222313111312 is a deficient number, since it is larger than the sum of its proper divisors (1170333304204).

1222313111312 is an equidigital number, since it uses as much as digits as its factorization.

1222313111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787572986 (or 787572980 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

Adding to 1222313111312 its reverse (2131113132221), we get a palindrome (3353426243533).

The spelling of 1222313111312 in words is "one trillion, two hundred twenty-two billion, three hundred thirteen million, one hundred eleven thousand, three hundred twelve".