1220402312 has 16 divisors (see below), whose sum is σ = 2288636700. Its totient is φ = 610099200.

The previous prime is 1220402263. The next prime is 1220402363. The reversal of 1220402312 is 2132040221.

It can be written as a sum of positive squares in 2 ways, for example, as 1220384356 + 17956 = 34934^2 + 134^2 .

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, 68864 + ... + 84752.

Almost surely, 2^1220402312 is an apocalyptic number.

It is an amenable number.

1220402312 is a deficient number, since it is larger than the sum of its proper divisors (1068234388).

1220402312 is a wasteful number, since it uses less digits than its factorization.

1220402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25496 (or 25492 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220402312 is about 34934.2569979669. The cubic root of 1220402312 is about 1068.6471714298.

Adding to 1220402312 its reverse (2132040221), we get a palindrome (3352442533).

The spelling of 1220402312 in words is "one billion, two hundred twenty million, four hundred two thousand, three hundred twelve".