2000121217 has 2 divisors, whose sum is σ = 2000121218. Its totient is φ = 2000121216.

The previous prime is 2000121199. The next prime is 2000121223. The reversal of 2000121217 is 7121210002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1728563776 + 271557441 = 41576^2 + 16479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000121217 is a prime.

It is a super-2 number, since 2×2000121217² = 8000969765387122178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2000121217.

It is not a weakly prime, because it can be changed into another prime (2000121257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000060608 + 1000060609.

It is an arithmetic number, because the mean of its divisors is an integer number (1000060609).

Almost surely, 2^2000121217 is an apocalyptic number.

It is an amenable number.

2000121217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000121217 is an equidigital number, since it uses as much as digits as its factorization.

2000121217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 2000121217 is about 44722.7147767217. The cubic root of 2000121217 is about 1259.9465033556.

Adding to 2000121217 its reverse (7121210002), we get a palindrome (9121331219).

The spelling of 2000121217 in words is "two billion, one hundred twenty-one thousand, two hundred seventeen".