2000121197 has 2 divisors, whose sum is σ = 2000121198. Its totient is φ = 2000121196.

The previous prime is 2000121187. The next prime is 2000121199. The reversal of 2000121197 is 7911210002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1257340681 + 742780516 = 35459^2 + 27254^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000121197 - 2¹⁰ = 2000120173 is a prime.

Together with 2000121199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000121199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000060598 + 1000060599.

It is an arithmetic number, because the mean of its divisors is an integer number (1000060599).

Almost surely, 2^2000121197 is an apocalyptic number.

It is an amenable number.

2000121197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000121197 is an equidigital number, since it uses as much as digits as its factorization.

2000121197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 2000121197 is about 44722.7145531217. The cubic root of 2000121197 is about 1259.9464991561.

Adding to 2000121197 its reverse (7911210002), we get a palindrome (9911331199).

The spelling of 2000121197 in words is "two billion, one hundred twenty-one thousand, one hundred ninety-seven".