12220012012221 has 72 divisors (see below), whose sum is σ = 21255636249120. Its totient is φ = 6705145557504.

The previous prime is 12220012012207. The next prime is 12220012012237. The reversal of 12220012012221 is 12221021002221.

It is a happy number.

12220012012221 is a `hidden beast` number, since 122 + 200 + 120 + 1 + 2 + 221 = 666.

It is not a de Polignac number, because 12220012012221 - 2⁶ = 12220012012157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220012012194 and 12220012012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220012012291) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8868075 + ... + 10152968.

Almost surely, 2^{12220012012221} is an apocalyptic number.

It is an amenable number.

12220012012221 is a deficient number, since it is larger than the sum of its proper divisors (9035624236899).

12220012012221 is a wasteful number, since it uses less digits than its factorization.

12220012012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19021115 (or 19021095 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12220012012221 its reverse (12221021002221), we get a palindrome (24441033014442).

The spelling of 12220012012221 in words is "twelve trillion, two hundred twenty billion, twelve million, twelve thousand, two hundred twenty-one".