1222222111112 has 8 divisors (see below), whose sum is σ = 2291666458350. Its totient is φ = 611111055552.

The previous prime is 1222222111109. The next prime is 1222222111157. The reversal of 1222222111112 is 2111112222221.

It can be written as a sum of positive squares in only one way, i.e., 1220375346436 + 1846764676 = 1104706^2 + 42974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76388881937 + ... + 76388881952.

Almost surely, 2^{1222222111112} is an apocalyptic number.

It is an amenable number.

1222222111112 is a deficient number, since it is larger than the sum of its proper divisors (1069444347238).

1222222111112 is a wasteful number, since it uses less digits than its factorization.

1222222111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152777763895 (or 152777763891 counting only the distinct ones).

The product of its digits is 128, while the sum is 20.

Adding to 1222222111112 its reverse (2111112222221), we get a palindrome (3333334333333).

The spelling of 1222222111112 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, one hundred twelve".