12220022021 has 2 divisors, whose sum is σ = 12220022022. Its totient is φ = 12220022020.

The previous prime is 12220022011. The next prime is 12220022033. The reversal of 12220022021 is 12022002221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9185113921 + 3034908100 = 95839^2 + 55090^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220022021 - 2¹⁰ = 12220020997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12220021987 and 12220022005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220022011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110011010 + 6110011011.

It is an arithmetic number, because the mean of its divisors is an integer number (6110011011).

Almost surely, 2^12220022021 is an apocalyptic number.

It is an amenable number.

12220022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220022021 is an equidigital number, since it uses as much as digits as its factorization.

12220022021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 12220022021 its reverse (12022002221), we get a palindrome (24242024242).

The spelling of 12220022021 in words is "twelve billion, two hundred twenty million, twenty-two thousand, twenty-one".