12220122120021 has 12 divisors (see below), whose sum is σ = 17734942900480. Its totient is φ = 8108137898280.

The previous prime is 12220122119987. The next prime is 12220122120029. The reversal of 12220122120021 is 12002122102221.

It is a happy number.

12220122120021 is a `hidden beast` number, since 1 + 2 + 220 + 1 + 221 + 200 + 21 = 666.

It is not a de Polignac number, because 12220122120021 - 2⁷ = 12220122119893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220122119976 and 12220122120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220122120029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3217513141 + ... + 3217516938.

Almost surely, 2^{12220122120021} is an apocalyptic number.

It is an amenable number.

12220122120021 is a deficient number, since it is larger than the sum of its proper divisors (5514820780459).

12220122120021 is a wasteful number, since it uses less digits than its factorization.

12220122120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6435030296 (or 6435030293 counting only the distinct ones).

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

Adding to 12220122120021 its reverse (12002122102221), we get a palindrome (24222244222242).

The spelling of 12220122120021 in words is "twelve trillion, two hundred twenty billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".