2121200022017 has 2 divisors, whose sum is σ = 2121200022018. Its totient is φ = 2121200022016.

The previous prime is 2121200022001. The next prime is 2121200022047. The reversal of 2121200022017 is 7102200021212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1815705045361 + 305494976656 = 1347481^2 + 552716^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121200022017 - 2⁴ = 2121200022001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121200022017.

It is not a weakly prime, because it can be changed into another prime (2121200022047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600011008 + 1060600011009.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600011009).

Almost surely, 2^{2121200022017} is an apocalyptic number.

It is an amenable number.

2121200022017 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121200022017 is an equidigital number, since it uses as much as digits as its factorization.

2121200022017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 2121200022017 its reverse (7102200021212), we get a palindrome (9223400043229).

The spelling of 2121200022017 in words is "two trillion, one hundred twenty-one billion, two hundred million, twenty-two thousand, seventeen".