1223125312 has 14 divisors (see below), whose sum is σ = 2427139418. Its totient is φ = 611562624.

The previous prime is 1223125301. The next prime is 1223125327. The reversal of 1223125312 is 2135213221.

It can be written as a sum of positive squares in only one way, i.e., 1195499776 + 27625536 = 34576^2 + 5256^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9555603 + ... + 9555730.

Almost surely, 2^1223125312 is an apocalyptic number.

It is an amenable number.

1223125312 is a deficient number, since it is larger than the sum of its proper divisors (1204014106).

1223125312 is an equidigital number, since it uses as much as digits as its factorization.

1223125312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111345 (or 19111335 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 1223125312 is about 34973.2084887847. The cubic root of 1223125312 is about 1069.4413807542.

Adding to 1223125312 its reverse (2135213221), we get a palindrome (3358338533).

The spelling of 1223125312 in words is "one billion, two hundred twenty-three million, one hundred twenty-five thousand, three hundred twelve".