22220202020221 has 2 divisors, whose sum is σ = 22220202020222. Its totient is φ = 22220202020220.

The previous prime is 22220202020209. The next prime is 22220202020227. The reversal of 22220202020221 is 12202020202222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20482313496121 + 1737888524100 = 4525739^2 + 1318290^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220202020221 - 2⁴¹ = 20021178764669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220202020227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110101010110 + 11110101010111.

It is an arithmetic number, because the mean of its divisors is an integer number (11110101010111).

Almost surely, 2^{22220202020221} is an apocalyptic number.

It is an amenable number.

22220202020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220202020221 is an equidigital number, since it uses as much as digits as its factorization.

22220202020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 22220202020221 its reverse (12202020202222), we get a palindrome (34422222222443).

The spelling of 22220202020221 in words is "twenty-two trillion, two hundred twenty billion, two hundred two million, twenty thousand, two hundred twenty-one".