20022222211021 has 2 divisors, whose sum is σ = 20022222211022. Its totient is φ = 20022222211020.

The previous prime is 20022222210983. The next prime is 20022222211049. The reversal of 20022222211021 is 12011222222002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11279260288521 + 8742961922500 = 3358461^2 + 2956850^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022222211021 - 2²⁷ = 20022087993293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20022222211021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022222281021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011111105510 + 10011111105511.

It is an arithmetic number, because the mean of its divisors is an integer number (10011111105511).

Almost surely, 2^{20022222211021} is an apocalyptic number.

It is an amenable number.

20022222211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022222211021 is an equidigital number, since it uses as much as digits as its factorization.

20022222211021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20022222211021 its reverse (12011222222002), we get a palindrome (32033444433023).

The spelling of 20022222211021 in words is "twenty trillion, twenty-two billion, two hundred twenty-two million, two hundred eleven thousand, twenty-one".