220222022221 has 2 divisors, whose sum is σ = 220222022222. Its totient is φ = 220222022220.

The previous prime is 220222022219. The next prime is 220222022243. The reversal of 220222022221 is 122220222022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110403352900 + 109818669321 = 332270^2 + 331389^2 .

It is a cyclic number.

It is not a de Polignac number, because 220222022221 - 2¹ = 220222022219 is a prime.

It is a super-2 number, since 2×220222022221² (a number of 23 digits) contains 22 as substring.

Together with 220222022219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220222022261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110111011110 + 110111011111.

It is an arithmetic number, because the mean of its divisors is an integer number (110111011111).

Almost surely, 2^220222022221 is an apocalyptic number.

It is an amenable number.

220222022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220222022221 is an equidigital number, since it uses as much as digits as its factorization.

220222022221 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 220222022221 its reverse (122220222022), we get a palindrome (342442244243).

The spelling of 220222022221 in words is "two hundred twenty billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-one".