1223131312 has 40 divisors (see below), whose sum is σ = 2554635104. Its totient is φ = 563963904.

The previous prime is 1223131307. The next prime is 1223131321. The reversal of 1223131312 is 2131313221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223131312.

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, 268768 + ... + 273280.

Almost surely, 2^1223131312 is an apocalyptic number.

It is an amenable number.

1223131312 is an abundant number, since it is smaller than the sum of its proper divisors (1331503792).

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

1223131312 is a wasteful number, since it uses less digits than its factorization.

1223131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5837 (or 5831 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1223131312 is about 34973.2942686273. The cubic root of 1223131312 is about 1069.4431294542.

Adding to 1223131312 its reverse (2131313221), we get a palindrome (3354444533).

The spelling of 1223131312 in words is "one billion, two hundred twenty-three million, one hundred thirty-one thousand, three hundred twelve".