13221022312 has 16 divisors (see below), whose sum is σ = 24799608900. Its totient is φ = 6607793280.

The previous prime is 13221022271. The next prime is 13221022333. The reversal of 13221022312 is 21322012231.

It can be written as a sum of positive squares in 2 ways, for example, as 10271011716 + 2950010596 = 101346^2 + 54314^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13221022312.

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, 318987 + ... + 358042.

Almost surely, 2^13221022312 is an apocalyptic number.

It is an amenable number.

13221022312 is a deficient number, since it is larger than the sum of its proper divisors (11578586588).

13221022312 is a wasteful number, since it uses less digits than its factorization.

13221022312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679476 (or 679472 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13221022312 its reverse (21322012231), we get a palindrome (34543034543).

The spelling of 13221022312 in words is "thirteen billion, two hundred twenty-one million, twenty-two thousand, three hundred twelve".