2122198740517 has 2 divisors, whose sum is σ = 2122198740518. Its totient is φ = 2122198740516.

The previous prime is 2122198740509. The next prime is 2122198740589. The reversal of 2122198740517 is 7150478912212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2041243695841 + 80955044676 = 1428721^2 + 284526^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122198740517 - 2³ = 2122198740509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122198740617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061099370258 + 1061099370259.

It is an arithmetic number, because the mean of its divisors is an integer number (1061099370259).

Almost surely, 2^{2122198740517} is an apocalyptic number.

It is an amenable number.

2122198740517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122198740517 is an equidigital number, since it uses as much as digits as its factorization.

2122198740517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 2122198740517 in words is "two trillion, one hundred twenty-two billion, one hundred ninety-eight million, seven hundred forty thousand, five hundred seventeen".