1222501312 has 56 divisors (see below), whose sum is σ = 2498516720. Its totient is φ = 593049600.

The previous prime is 1222501303. The next prime is 1222501321. The reversal of 1222501312 is 2131052221.

It is an interprime number because it is at equal distance from previous prime (1222501303) and next prime (1222501321).

It is a self number, because there is not a number n which added to its sum of digits gives 1222501312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1422739 + ... + 1423597.

It is an arithmetic number, because the mean of its divisors is an integer number (44616370).

Almost surely, 2^1222501312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222501312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249258360).

1222501312 is an abundant number, since it is smaller than the sum of its proper divisors (1276015408).

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

1222501312 is an equidigital number, since it uses as much as digits as its factorization.

1222501312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1222501312 is about 34964.2862361010. The cubic root of 1222501312 is about 1069.2594847181.

Adding to 1222501312 its reverse (2131052221), we get a palindrome (3353553533).

The spelling of 1222501312 in words is "one billion, two hundred twenty-two million, five hundred one thousand, three hundred twelve".