2121002197 has 2 divisors, whose sum is σ = 2121002198. Its totient is φ = 2121002196.

The previous prime is 2121002159. The next prime is 2121002207. The reversal of 2121002197 is 7912001212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1977936676 + 143065521 = 44474^2 + 11961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121002197 - 2⁷ = 2121002069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121002497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060501098 + 1060501099.

It is an arithmetic number, because the mean of its divisors is an integer number (1060501099).

Almost surely, 2^2121002197 is an apocalyptic number.

It is an amenable number.

2121002197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121002197 is an equidigital number, since it uses as much as digits as its factorization.

2121002197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 2121002197 is about 46054.3396109422. The cubic root of 2121002197 is about 1284.8340556955.

The spelling of 2121002197 in words is "two billion, one hundred twenty-one million, two thousand, one hundred ninety-seven".