12122200220221 has 12 divisors (see below), whose sum is σ = 15186053023932. Its totient is φ = 9591191382528.

The previous prime is 12122200220183. The next prime is 12122200220239. The reversal of 12122200220221 is 12202200222121.

It can be written as a sum of positive squares in 2 ways, for example, as 5131067614596 + 6991132605625 = 2265186^2 + 2644075^2 .

It is not a de Polignac number, because 12122200220221 - 2⁹ = 12122200219709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122200220821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9515070180 + ... + 9515071453.

It is an arithmetic number, because the mean of its divisors is an integer number (1265504418661).

Almost surely, 2^{12122200220221} is an apocalyptic number.

It is an amenable number.

12122200220221 is a deficient number, since it is larger than the sum of its proper divisors (3063852803711).

12122200220221 is a wasteful number, since it uses less digits than its factorization.

12122200220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19030141660 (or 19030141653 counting only the distinct ones).

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

Adding to 12122200220221 its reverse (12202200222121), we get a palindrome (24324400442342).

The spelling of 12122200220221 in words is "twelve trillion, one hundred twenty-two billion, two hundred million, two hundred twenty thousand, two hundred twenty-one".