12221204401 has 4 divisors (see below), whose sum is σ = 13967090752. Its totient is φ = 10475318052.

The previous prime is 12221204357. The next prime is 12221204417. The reversal of 12221204401 is 10440212221.

12221204401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 12221204401 - 2⁹ = 12221203889 is a prime.

It is a super-2 number, since 2×12221204401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221204461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872943165 + ... + 872943178.

It is an arithmetic number, because the mean of its divisors is an integer number (3491772688).

Almost surely, 2^12221204401 is an apocalyptic number.

It is an amenable number.

12221204401 is a deficient number, since it is larger than the sum of its proper divisors (1745886351).

12221204401 is an equidigital number, since it uses as much as digits as its factorization.

12221204401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745886350.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12221204401 its reverse (10440212221), we get a palindrome (22661416622).

The spelling of 12221204401 in words is "twelve billion, two hundred twenty-one million, two hundred four thousand, four hundred one".