20220022021 has 2 divisors, whose sum is σ = 20220022022. Its totient is φ = 20220022020.

The previous prime is 20220022013. The next prime is 20220022027. The reversal of 20220022021 is 12022002202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18002930625 + 2217091396 = 134175^2 + 47086^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220022021 - 2³ = 20220022013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20220021992 and 20220022010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220022027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110011010 + 10110011011.

It is an arithmetic number, because the mean of its divisors is an integer number (10110011011).

Almost surely, 2^20220022021 is an apocalyptic number.

It is an amenable number.

20220022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220022021 is an equidigital number, since it uses as much as digits as its factorization.

20220022021 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 13.

Adding to 20220022021 its reverse (12022002202), we get a palindrome (32242024223).

The spelling of 20220022021 in words is "twenty billion, two hundred twenty million, twenty-two thousand, twenty-one".