1222222212 has 36 divisors (see below), whose sum is σ = 3092951680. Its totient is φ = 406953072.

The previous prime is 1222222189. The next prime is 1222222223. The reversal of 1222222212 is 2122222221.

It is a tau number, because it is divible by the number of its divisors (36).

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14613 + ... + 51555.

Almost surely, 2^1222222212 is an apocalyptic number.

1222222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222222212 is an abundant number, since it is smaller than the sum of its proper divisors (1870729468).

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

1222222212 is a wasteful number, since it uses less digits than its factorization.

1222222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37872 (or 37867 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 1222222212 is about 34960.2947928075. The cubic root of 1222222212 is about 1069.1781070179.

Adding to 1222222212 its reverse (2122222221), we get a palindrome (3344444433).

Subtracting 1222222212 from its reverse (2122222221), we obtain a palindrome (900000009).

It can be divided in two parts, 122222221 and 2, that multiplied together give a palindrome (244444442).

The spelling of 1222222212 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twelve".