2120010222221 has 2 divisors, whose sum is σ = 2120010222222. Its totient is φ = 2120010222220.

The previous prime is 2120010222199. The next prime is 2120010222223. The reversal of 2120010222221 is 1222220100212.

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., 1336810002025 + 783200220196 = 1156205^2 + 884986^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120010222221 - 2³⁴ = 2102830353037 is a prime.

Together with 2120010222223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120010222221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120010222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060005111110 + 1060005111111.

It is an arithmetic number, because the mean of its divisors is an integer number (1060005111111).

Almost surely, 2^{2120010222221} is an apocalyptic number.

It is an amenable number.

2120010222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120010222221 is an equidigital number, since it uses as much as digits as its factorization.

2120010222221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2120010222221 its reverse (1222220100212), we get a palindrome (3342230322433).

The spelling of 2120010222221 in words is "two trillion, one hundred twenty billion, ten million, two hundred twenty-two thousand, two hundred twenty-one".