1222421312 has 56 divisors (see below), whose sum is σ = 2935370304. Its totient is φ = 493074432.

The previous prime is 1222421279. The next prime is 1222421323. The reversal of 1222421312 is 2131242221.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

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, 72638 + ... + 87869.

Almost surely, 2^1222421312 is an apocalyptic number.

It is an amenable number.

1222421312 is an abundant number, since it is smaller than the sum of its proper divisors (1712948992).

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

1222421312 is a wasteful number, since it uses less digits than its factorization.

1222421312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160543 (or 160533 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 1222421312 is about 34963.1421928865. The cubic root of 1222421312 is about 1069.2361602374.

Adding to 1222421312 its reverse (2131242221), we get a palindrome (3353663533).

The spelling of 1222421312 in words is "one billion, two hundred twenty-two million, four hundred twenty-one thousand, three hundred twelve".