212022112121 has 2 divisors, whose sum is σ = 212022112122. Its totient is φ = 212022112120.

The previous prime is 212022112111. The next prime is 212022112151. The reversal of 212022112121 is 121211220212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146833809721 + 65188302400 = 383189^2 + 255320^2 .

It is a cyclic number.

It is not a de Polignac number, because 212022112121 - 2²² = 212017917817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212022112121.

It is not a weakly prime, because it can be changed into another prime (212022112111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011056060 + 106011056061.

It is an arithmetic number, because the mean of its divisors is an integer number (106011056061).

Almost surely, 2^212022112121 is an apocalyptic number.

It is an amenable number.

212022112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212022112121 is an equidigital number, since it uses as much as digits as its factorization.

212022112121 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 17.

Adding to 212022112121 its reverse (121211220212), we get a palindrome (333233332333).

The spelling of 212022112121 in words is "two hundred twelve billion, twenty-two million, one hundred twelve thousand, one hundred twenty-one".