22020101221 has 2 divisors, whose sum is σ = 22020101222. Its totient is φ = 22020101220.

The previous prime is 22020101183. The next prime is 22020101239. The reversal of 22020101221 is 12210102022.

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., 20418981025 + 1601120196 = 142895^2 + 40014^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020101221 - 2¹¹ = 22020099173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22020101291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010050610 + 11010050611.

It is an arithmetic number, because the mean of its divisors is an integer number (11010050611).

Almost surely, 2^22020101221 is an apocalyptic number.

It is an amenable number.

22020101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020101221 is an equidigital number, since it uses as much as digits as its factorization.

22020101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22020101221 its reverse (12210102022), we get a palindrome (34230203243).

The spelling of 22020101221 in words is "twenty-two billion, twenty million, one hundred one thousand, two hundred twenty-one".