2211200022121 has 2 divisors, whose sum is σ = 2211200022122. Its totient is φ = 2211200022120.

The previous prime is 2211200022113. The next prime is 2211200022181. The reversal of 2211200022121 is 1212200021122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1361447909721 + 849752112400 = 1166811^2 + 921820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211200022121 - 2³ = 2211200022113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211200022095 and 2211200022104.

It is not a weakly prime, because it can be changed into another prime (2211200022181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105600011060 + 1105600011061.

It is an arithmetic number, because the mean of its divisors is an integer number (1105600011061).

Almost surely, 2^{2211200022121} is an apocalyptic number.

It is an amenable number.

2211200022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211200022121 is an equidigital number, since it uses as much as digits as its factorization.

2211200022121 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 2211200022121 its reverse (1212200021122), we get a palindrome (3423400043243).

Subtracting from 2211200022121 its reverse (1212200021122), we obtain a palindrome (999000000999).

The spelling of 2211200022121 in words is "two trillion, two hundred eleven billion, two hundred million, twenty-two thousand, one hundred twenty-one".