12221441165 has 8 divisors (see below), whose sum is σ = 14669174520. Its totient is φ = 9774856192.

The previous prime is 12221441149. The next prime is 12221441191. The reversal of 12221441165 is 56114412221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3561463684 + 8659977481 = 59678^2 + 93059^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12221441165 - 2⁴ = 12221441149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263504 + ... + 306393.

It is an arithmetic number, because the mean of its divisors is an integer number (1833646815).

Almost surely, 2^12221441165 is an apocalyptic number.

It is an amenable number.

12221441165 is a deficient number, since it is larger than the sum of its proper divisors (2447733355).

12221441165 is an equidigital number, since it uses as much as digits as its factorization.

12221441165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574191.

The product of its digits is 3840, while the sum is 29.

Adding to 12221441165 its reverse (56114412221), we get a palindrome (68335853386).

The spelling of 12221441165 in words is "twelve billion, two hundred twenty-one million, four hundred forty-one thousand, one hundred sixty-five".