2120222112121 has 2 divisors, whose sum is σ = 2120222112122. Its totient is φ = 2120222112120.

The previous prime is 2120222112109. The next prime is 2120222112149. The reversal of 2120222112121 is 1212112220212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1303387555600 + 816834556521 = 1141660^2 + 903789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120222112121 - 2⁷ = 2120222111993 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120222112721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060111056060 + 1060111056061.

It is an arithmetic number, because the mean of its divisors is an integer number (1060111056061).

Almost surely, 2^{2120222112121} is an apocalyptic number.

It is an amenable number.

2120222112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120222112121 is an equidigital number, since it uses as much as digits as its factorization.

2120222112121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2120222112121 its reverse (1212112220212), we get a palindrome (3332334332333).

The spelling of 2120222112121 in words is "two trillion, one hundred twenty billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".