13220232321 has 8 divisors (see below), whose sum is σ = 17627586624. Its totient is φ = 8813183120.

The previous prime is 13220232301. The next prime is 13220232409. The reversal of 13220232321 is 12323202231.

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 13220232321 - 2²³ = 13211843713 is a prime.

It is a super-4 number, since 4×13220232321⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (13220232301) 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, 59215 + ... + 173051.

It is an arithmetic number, because the mean of its divisors is an integer number (2203448328).

Almost surely, 2^13220232321 is an apocalyptic number.

It is an amenable number.

13220232321 is a deficient number, since it is larger than the sum of its proper divisors (4407354303).

13220232321 is a wasteful number, since it uses less digits than its factorization.

13220232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152551.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 13220232321 its reverse (12323202231), we get a palindrome (25543434552).

The spelling of 13220232321 in words is "thirteen billion, two hundred twenty million, two hundred thirty-two thousand, three hundred twenty-one".