12222113621 has 4 divisors (see below), whose sum is σ = 12376824000. Its totient is φ = 12067403244.

The previous prime is 12222113611. The next prime is 12222113639. The reversal of 12222113621 is 12631122221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222113621 is a prime.

It is a super-2 number, since 2×12222113621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222113611) 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, 77355071 + ... + 77355228.

It is an arithmetic number, because the mean of its divisors is an integer number (3094206000).

Almost surely, 2^12222113621 is an apocalyptic number.

It is an amenable number.

12222113621 is a deficient number, since it is larger than the sum of its proper divisors (154710379).

12222113621 is an equidigital number, since it uses as much as digits as its factorization.

12222113621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154710378.

The product of its digits is 576, while the sum is 23.

Adding to 12222113621 its reverse (12631122221), we get a palindrome (24853235842).

The spelling of 12222113621 in words is "twelve billion, two hundred twenty-two million, one hundred thirteen thousand, six hundred twenty-one".