12441612221 has 4 divisors (see below), whose sum is σ = 12506751744. Its totient is φ = 12376472700.

The previous prime is 12441612133. The next prime is 12441612241. The reversal of 12441612221 is 12221614421.

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 12441612221 - 2¹⁰ = 12441611197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12441612241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32569475 + ... + 32569856.

It is an arithmetic number, because the mean of its divisors is an integer number (3126687936).

Almost surely, 2^12441612221 is an apocalyptic number.

It is an amenable number.

12441612221 is a deficient number, since it is larger than the sum of its proper divisors (65139523).

12441612221 is an equidigital number, since it uses as much as digits as its factorization.

12441612221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65139522.

The product of its digits is 1536, while the sum is 26.

The spelling of 12441612221 in words is "twelve billion, four hundred forty-one million, six hundred twelve thousand, two hundred twenty-one".