211200198997 has 2 divisors, whose sum is σ = 211200198998. Its totient is φ = 211200198996.

The previous prime is 211200198977. The next prime is 211200199009. The reversal of 211200198997 is 799891002112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203208017796 + 7992181201 = 450786^2 + 89399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211200198997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211200198997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211200198907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600099498 + 105600099499.

It is an arithmetic number, because the mean of its divisors is an integer number (105600099499).

Almost surely, 2^211200198997 is an apocalyptic number.

It is an amenable number.

211200198997 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200198997 is an equidigital number, since it uses as much as digits as its factorization.

211200198997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 211200198997 in words is "two hundred eleven billion, two hundred million, one hundred ninety-eight thousand, nine hundred ninety-seven".