13330031221 has 16 divisors (see below), whose sum is σ = 14856629760. Its totient is φ = 11875389120.

The previous prime is 13330031213. The next prime is 13330031243. The reversal of 13330031221 is 12213003331.

It is a cyclic number.

It is not a de Polignac number, because 13330031221 - 2³ = 13330031213 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 (13330031621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129276 + ... + 1141018.

It is an arithmetic number, because the mean of its divisors is an integer number (928539360).

Almost surely, 2^13330031221 is an apocalyptic number.

It is an amenable number.

13330031221 is a deficient number, since it is larger than the sum of its proper divisors (1526598539).

13330031221 is a wasteful number, since it uses less digits than its factorization.

13330031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14796.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 13330031221 its reverse (12213003331), we get a palindrome (25543034552).

The spelling of 13330031221 in words is "thirteen billion, three hundred thirty million, thirty-one thousand, two hundred twenty-one".