13221999999 has 48 divisors (see below), whose sum is σ = 21274815744. Its totient is φ = 7857907200.

The previous prime is 13221999997. The next prime is 13222000007. The reversal of 13221999999 is 99999912231.

It is not a de Polignac number, because 13221999999 - 2¹ = 13221999997 is a prime.

13221999999 is a modest number, since divided by 999999 gives 13221 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221999997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1886169 + ... + 1893165.

It is an arithmetic number, because the mean of its divisors is an integer number (443225328).

Almost surely, 2^13221999999 is an apocalyptic number.

13221999999 is a deficient number, since it is larger than the sum of its proper divisors (8052815745).

13221999999 is a wasteful number, since it uses less digits than its factorization.

13221999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568 (or 7565 counting only the distinct ones).

The product of its digits is 6377292, while the sum is 63.

The spelling of 13221999999 in words is "thirteen billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".