1223161312 has 12 divisors (see below), whose sum is σ = 2408098896. Its totient is φ = 611580640.

The previous prime is 1223161307. The next prime is 1223161363. The reversal of 1223161312 is 2131613221.

It is a happy number.

It is a super-2 number, since 2×1223161312² = 2992247190347122688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19111864 + ... + 19111927.

It is an arithmetic number, because the mean of its divisors is an integer number (200674908).

Almost surely, 2^1223161312 is an apocalyptic number.

It is an amenable number.

1223161312 is a deficient number, since it is larger than the sum of its proper divisors (1184937584).

1223161312 is an equidigital number, since it uses as much as digits as its factorization.

1223161312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38223801 (or 38223793 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1223161312 is about 34973.7231646847. The cubic root of 1223161312 is about 1069.4518728685.

Adding to 1223161312 its reverse (2131613221), we get a palindrome (3354774533).

The spelling of 1223161312 in words is "one billion, two hundred twenty-three million, one hundred sixty-one thousand, three hundred twelve".