210099999997 has 2 divisors, whose sum is σ = 210099999998. Its totient is φ = 210099999996.

The previous prime is 210099999937. The next prime is 210100000001. The reversal of 210099999997 is 799999990012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206634794041 + 3465205956 = 454571^2 + 58866^2 .

It is a cyclic number.

It is not a de Polignac number, because 210099999997 - 2¹⁵ = 210099967229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210099999917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105049999998 + 105049999999.

It is an arithmetic number, because the mean of its divisors is an integer number (105049999999).

Almost surely, 2^210099999997 is an apocalyptic number.

It is an amenable number.

210099999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

210099999997 is an equidigital number, since it uses as much as digits as its factorization.

210099999997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66961566, while the sum is 73.

The spelling of 210099999997 in words is "two hundred ten billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-seven".