13002221 has 8 divisors (see below), whose sum is σ = 13480320. Its totient is φ = 12532608.

The previous prime is 13002203. The next prime is 13002233. The reversal of 13002221 is 12220031.

It is a happy number.

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 13002221 - 2²² = 8807917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13002421) 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, 1085 + ... + 5213.

It is an arithmetic number, because the mean of its divisors is an integer number (1685040).

Almost surely, 2^13002221 is an apocalyptic number.

It is an amenable number.

13002221 is a deficient number, since it is larger than the sum of its proper divisors (478099).

13002221 is an equidigital number, since it uses as much as digits as its factorization.

13002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 13002221 is about 3605.8592595940. The cubic root of 13002221 is about 235.1468585592.

Adding to 13002221 its reverse (12220031), we get a palindrome (25222252).

The spelling of 13002221 in words is "thirteen million, two thousand, two hundred twenty-one".