13221811667 has 8 divisors (see below), whose sum is σ = 13319463360. Its totient is φ = 13124361960.

The previous prime is 13221811663. The next prime is 13221811697. The reversal of 13221811667 is 76611812231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13221811667 - 2² = 13221811663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13221811667.

It is not an unprimeable number, because it can be changed into a prime (13221811663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82184 + ... + 182202.

It is an arithmetic number, because the mean of its divisors is an integer number (1664932920).

Almost surely, 2^13221811667 is an apocalyptic number.

13221811667 is a deficient number, since it is larger than the sum of its proper divisors (97651693).

13221811667 is a wasteful number, since it uses less digits than its factorization.

13221811667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100993.

The product of its digits is 24192, while the sum is 38.

The spelling of 13221811667 in words is "thirteen billion, two hundred twenty-one million, eight hundred eleven thousand, six hundred sixty-seven".