1222122212 has 24 divisors (see below), whose sum is σ = 2166798816. Its totient is φ = 603052928.

The previous prime is 1222122211. The next prime is 1222122217. The reversal of 1222122212 is 2122212221.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1222122211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504428 + ... + 506844.

It is an arithmetic number, because the mean of its divisors is an integer number (90283284).

Almost surely, 2^1222122212 is an apocalyptic number.

It is an amenable number.

1222122212 is a deficient number, since it is larger than the sum of its proper divisors (944676604).

1222122212 is a wasteful number, since it uses less digits than its factorization.

1222122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027 (or 4025 counting only the distinct ones).

The product of its digits is 128, while the sum is 17.

The square root of 1222122212 is about 34958.8645696624. The cubic root of 1222122212 is about 1069.1489468194.

Adding to 1222122212 its reverse (2122212221), we get a palindrome (3344334433).

Subtracting 1222122212 from its reverse (2122212221), we obtain a palindrome (900090009).

It can be divided in two parts, 122212221 and 2, that multiplied together give a palindrome (244424442).

The spelling of 1222122212 in words is "one billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twelve".