1220323312 has 30 divisors (see below), whose sum is σ = 2560247592. Its totient is φ = 563224896.

The previous prime is 1220323289. The next prime is 1220323319. The reversal of 1220323312 is 2133230221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220323312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220323319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222948 + ... + 228355.

Almost surely, 2^1220323312 is an apocalyptic number.

It is an amenable number.

1220323312 is an abundant number, since it is smaller than the sum of its proper divisors (1339924280).

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

1220323312 is a wasteful number, since it uses less digits than its factorization.

1220323312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451337 (or 451318 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1220323312 is about 34933.1262843737. The cubic root of 1220323312 is about 1068.6241121082.

Adding to 1220323312 its reverse (2133230221), we get a palindrome (3353553533).

The spelling of 1220323312 in words is "one billion, two hundred twenty million, three hundred twenty-three thousand, three hundred twelve".