2102199997 has 2 divisors, whose sum is σ = 2102199998. Its totient is φ = 2102199996.

The previous prime is 2102199989. The next prime is 2102200007. The reversal of 2102199997 is 7999912012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1253584836 + 848615161 = 35406^2 + 29131^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102199997 - 2³ = 2102199989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102199997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102199917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051099998 + 1051099999.

It is an arithmetic number, because the mean of its divisors is an integer number (1051099999).

Almost surely, 2^2102199997 is an apocalyptic number.

It is an amenable number.

2102199997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102199997 is an equidigital number, since it uses as much as digits as its factorization.

2102199997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 49.

The square root of 2102199997 is about 45849.7546013062. The cubic root of 2102199997 is about 1281.0261946837.

The spelling of 2102199997 in words is "two billion, one hundred two million, one hundred ninety-nine thousand, nine hundred ninety-seven".