20202222211121 has 2 divisors, whose sum is σ = 20202222211122. Its totient is φ = 20202222211120.

The previous prime is 20202222211037. The next prime is 20202222211211. The reversal of 20202222211121 is 12111222220202.

Together with next prime (20202222211211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11972845632400 + 8229376578721 = 3460180^2 + 2868689^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202222211121 - 2²⁶ = 20202155102257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202222211093 and 20202222211102.

It is not a weakly prime, because it can be changed into another prime (20202225211121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101111105560 + 10101111105561.

It is an arithmetic number, because the mean of its divisors is an integer number (10101111105561).

Almost surely, 2^{20202222211121} is an apocalyptic number.

It is an amenable number.

20202222211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202222211121 is an equidigital number, since it uses as much as digits as its factorization.

20202222211121 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 20.

Adding to 20202222211121 its reverse (12111222220202), we get a palindrome (32313444431323).

The spelling of 20202222211121 in words is "twenty trillion, two hundred two billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-one".