12220012221 has 8 divisors (see below), whose sum is σ = 16499594880. Its totient is φ = 8043552192.

The previous prime is 12220012219. The next prime is 12220012249. The reversal of 12220012221 is 12221002221.

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

It is not a de Polignac number, because 12220012221 - 2¹ = 12220012219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12220012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220019221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25780380 + ... + 25780853.

It is an arithmetic number, because the mean of its divisors is an integer number (2062449360).

Almost surely, 2^12220012221 is an apocalyptic number.

It is an amenable number.

12220012221 is a deficient number, since it is larger than the sum of its proper divisors (4279582659).

12220012221 is an equidigital number, since it uses as much as digits as its factorization.

12220012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51561315.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12220012221 its reverse (12221002221), we get a palindrome (24441014442).

It can be divided in two parts, 122200 and 12221, that added together give a triangular number (134421 = T₅₁₈).

The spelling of 12220012221 in words is "twelve billion, two hundred twenty million, twelve thousand, two hundred twenty-one".