20222111020021 has 2 divisors, whose sum is σ = 20222111020022. Its totient is φ = 20222111020020.

The previous prime is 20222111019977. The next prime is 20222111020051. The reversal of 20222111020021 is 12002011122202.

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., 19503661527025 + 718449492996 = 4416295^2 + 847614^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222111020021 - 2³¹ = 20219963536373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20222111019977 and 20222111020004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20222111020051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111055510010 + 10111055510011.

It is an arithmetic number, because the mean of its divisors is an integer number (10111055510011).

Almost surely, 2^{20222111020021} is an apocalyptic number.

It is an amenable number.

20222111020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222111020021 is an equidigital number, since it uses as much as digits as its factorization.

20222111020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20222111020021 its reverse (12002011122202), we get a palindrome (32224122142223).

The spelling of 20222111020021 in words is "twenty trillion, two hundred twenty-two billion, one hundred eleven million, twenty thousand, twenty-one".