12220001222221 has 8 divisors (see below), whose sum is σ = 13196658706560. Its totient is φ = 11248580507952.

The previous prime is 12220001222189. The next prime is 12220001222227. The reversal of 12220001222221 is 12222210002221.

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 12220001222221 - 2⁵ = 12220001222189 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 (12220001222227) 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, 1309187665 + ... + 1309196998.

It is an arithmetic number, because the mean of its divisors is an integer number (1649582338320).

Almost surely, 2^{12220001222221} is an apocalyptic number.

It is an amenable number.

12220001222221 is a deficient number, since it is larger than the sum of its proper divisors (976657484339).

12220001222221 is a wasteful number, since it uses less digits than its factorization.

12220001222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618385035.

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

Adding to 12220001222221 its reverse (12222210002221), we get a palindrome (24442211224442).

The spelling of 12220001222221 in words is "twelve trillion, two hundred twenty billion, one million, two hundred twenty-two thousand, two hundred twenty-one".