1222201312 has 24 divisors (see below), whose sum is σ = 2409051456. Its totient is φ = 610378752.

The previous prime is 1222201297. The next prime is 1222201327. The reversal of 1222201312 is 2131022221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1222201297) and next prime (1222201327).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 5488 + ... + 49744.

It is an arithmetic number, because the mean of its divisors is an integer number (100377144).

Almost surely, 2^1222201312 is an apocalyptic number.

It is an amenable number.

1222201312 is a deficient number, since it is larger than the sum of its proper divisors (1186850144).

1222201312 is an equidigital number, since it uses as much as digits as its factorization.

1222201312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45130 (or 45122 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1222201312 is about 34959.9958810066. The cubic root of 1222201312 is about 1069.1720126679.

Adding to 1222201312 its reverse (2131022221), we get a palindrome (3353223533).

The spelling of 1222201312 in words is "one billion, two hundred twenty-two million, two hundred one thousand, three hundred twelve".