12221121323 has 4 divisors (see below), whose sum is σ = 12752474448. Its totient is φ = 11689768200.

The previous prime is 12221121281. The next prime is 12221121329. The reversal of 12221121323 is 32312112221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12221121323 - 2¹⁰ = 12221120299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221121295 and 12221121304.

It is not an unprimeable number, because it can be changed into a prime (12221121329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265676528 + ... + 265676573.

It is an arithmetic number, because the mean of its divisors is an integer number (3188118612).

Almost surely, 2^12221121323 is an apocalyptic number.

12221121323 is a deficient number, since it is larger than the sum of its proper divisors (531353125).

12221121323 is an equidigital number, since it uses as much as digits as its factorization.

12221121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531353124.

The product of its digits is 288, while the sum is 20.

Adding to 12221121323 its reverse (32312112221), we get a palindrome (44533233544).

The spelling of 12221121323 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred twenty-three".