2000000121997 has 2 divisors, whose sum is σ = 2000000121998. Its totient is φ = 2000000121996.

The previous prime is 2000000121979. The next prime is 2000000122139. The reversal of 2000000121997 is 7991210000002.

Together with previous prime (2000000121979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1735571742921 + 264428379076 = 1317411^2 + 514226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000000121997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000000121967) 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, 1000000060998 + 1000000060999.

It is an arithmetic number, because the mean of its divisors is an integer number (1000000060999).

Almost surely, 2^{2000000121997} is an apocalyptic number.

It is an amenable number.

2000000121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000000121997 is an equidigital number, since it uses as much as digits as its factorization.

2000000121997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

Adding to 2000000121997 its reverse (7991210000002), we get a palindrome (9991210121999).

The spelling of 2000000121997 in words is "two trillion, one hundred twenty-one thousand, nine hundred ninety-seven".