20222201102221 has 2 divisors, whose sum is σ = 20222201102222. Its totient is φ = 20222201102220.

The previous prime is 20222201102177. The next prime is 20222201102249. The reversal of 20222201102221 is 12220110222202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17634330455625 + 2587870646596 = 4199325^2 + 1608686^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222201102221 - 2²¹ = 20222199005069 is a prime.

It is a super-2 number, since 2×20222201102221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20222201102251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111100551110 + 10111100551111.

It is an arithmetic number, because the mean of its divisors is an integer number (10111100551111).

Almost surely, 2^{20222201102221} is an apocalyptic number.

It is an amenable number.

20222201102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222201102221 is an equidigital number, since it uses as much as digits as its factorization.

20222201102221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20222201102221 its reverse (12220110222202), we get a palindrome (32442311324423).

The spelling of 20222201102221 in words is "twenty trillion, two hundred twenty-two billion, two hundred one million, one hundred two thousand, two hundred twenty-one".