12220120210021 has 2 divisors, whose sum is σ = 12220120210022. Its totient is φ = 12220120210020.

The previous prime is 12220120209977. The next prime is 12220120210033. The reversal of 12220120210021 is 12001202102221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8867233284100 + 3352886925921 = 2977790^2 + 1831089^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220120210021 - 2³¹ = 12217972726373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220120209977 and 12220120210004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220120210621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110060105010 + 6110060105011.

It is an arithmetic number, because the mean of its divisors is an integer number (6110060105011).

Almost surely, 2^{12220120210021} is an apocalyptic number.

It is an amenable number.

12220120210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220120210021 is an equidigital number, since it uses as much as digits as its factorization.

12220120210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12220120210021 its reverse (12001202102221), we get a palindrome (24221322312242).

The spelling of 12220120210021 in words is "twelve trillion, two hundred twenty billion, one hundred twenty million, two hundred ten thousand, twenty-one".