20222211281 has 2 divisors, whose sum is σ = 20222211282. Its totient is φ = 20222211280.

The previous prime is 20222211239. The next prime is 20222211301. The reversal of 20222211281 is 18211222202.

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., 13919280400 + 6302930881 = 117980^2 + 79391^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222211281 - 2¹⁰ = 20222210257 is a prime.

It is a super-2 number, since 2×20222211281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20222211221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111105640 + 10111105641.

It is an arithmetic number, because the mean of its divisors is an integer number (10111105641).

Almost surely, 2^20222211281 is an apocalyptic number.

It is an amenable number.

20222211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222211281 is an equidigital number, since it uses as much as digits as its factorization.

20222211281 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 23.

Adding to 20222211281 its reverse (18211222202), we get a palindrome (38433433483).

The spelling of 20222211281 in words is "twenty billion, two hundred twenty-two million, two hundred eleven thousand, two hundred eighty-one".