12221221323 has 8 divisors (see below), whose sum is σ = 16735366288. Its totient is φ = 7927278624.

The previous prime is 12221221321. The next prime is 12221221333. The reversal of 12221221323 is 32312212221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12221221323 - 2¹ = 12221221321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221221323.

It is not an unprimeable number, because it can be changed into a prime (12221221321) 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, 55050436 + ... + 55050657.

It is an arithmetic number, because the mean of its divisors is an integer number (2091920786).

Almost surely, 2^12221221323 is an apocalyptic number.

12221221323 is a deficient number, since it is larger than the sum of its proper divisors (4514144965).

12221221323 is a wasteful number, since it uses less digits than its factorization.

12221221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110101133.

The product of its digits is 576, while the sum is 21.

Adding to 12221221323 its reverse (32312212221), we get a palindrome (44533433544).

The spelling of 12221221323 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-three".