12221313321 has 32 divisors (see below), whose sum is σ = 19030007808. Its totient is φ = 6831132480.

The previous prime is 12221313317. The next prime is 12221313341. The reversal of 12221313321 is 12331312221.

It is not a de Polignac number, because 12221313321 - 2² = 12221313317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12221313341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3327316 + ... + 3330986.

It is an arithmetic number, because the mean of its divisors is an integer number (594687744).

Almost surely, 2^12221313321 is an apocalyptic number.

It is an amenable number.

12221313321 is a deficient number, since it is larger than the sum of its proper divisors (6808694487).

12221313321 is a wasteful number, since it uses less digits than its factorization.

12221313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101.

The product of its digits is 432, while the sum is 21.

Adding to 12221313321 its reverse (12331312221), we get a palindrome (24552625542).

The spelling of 12221313321 in words is "twelve billion, two hundred twenty-one million, three hundred thirteen thousand, three hundred twenty-one".