13221801 has 24 divisors (see below), whose sum is σ = 20442240. Its totient is φ = 8205696.

The previous prime is 13221781. The next prime is 13221821. The reversal of 13221801 is 10812231.

It is an interprime number because it is at equal distance from previous prime (13221781) and next prime (13221821).

It is not a de Polignac number, because 13221801 - 2⁶ = 13221737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13221821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15340 + ... + 16178.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^13221801 is an apocalyptic number.

It is an amenable number.

13221801 is a deficient number, since it is larger than the sum of its proper divisors (7220439).

13221801 is a wasteful number, since it uses less digits than its factorization.

13221801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 13221801 is about 3636.1794510172. The cubic root of 13221801 is about 236.4631870912.

The spelling of 13221801 in words is "thirteen million, two hundred twenty-one thousand, eight hundred one".