2122021211897 has 2 divisors, whose sum is σ = 2122021211898. Its totient is φ = 2122021211896.

The previous prime is 2122021211851. The next prime is 2122021212011. The reversal of 2122021211897 is 7981121202212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1723139283856 + 398881928041 = 1312684^2 + 631571^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122021211897 - 2²⁰ = 2122020163321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2122021211897.

It is not a weakly prime, because it can be changed into another prime (2122021271897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061010605948 + 1061010605949.

It is an arithmetic number, because the mean of its divisors is an integer number (1061010605949).

Almost surely, 2^{2122021211897} is an apocalyptic number.

It is an amenable number.

2122021211897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122021211897 is an equidigital number, since it uses as much as digits as its factorization.

2122021211897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 2122021211897 in words is "two trillion, one hundred twenty-two billion, twenty-one million, two hundred eleven thousand, eight hundred ninety-seven".