211200020197 has 4 divisors (see below), whose sum is σ = 215693637696. Its totient is φ = 206706402700.

The previous prime is 211200020177. The next prime is 211200020201. The reversal of 211200020197 is 791020002112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211200020197 - 2⁷ = 211200020069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200020107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2246808679 + ... + 2246808772.

It is an arithmetic number, because the mean of its divisors is an integer number (53923409424).

Almost surely, 2^211200020197 is an apocalyptic number.

It is an amenable number.

211200020197 is a deficient number, since it is larger than the sum of its proper divisors (4493617499).

211200020197 is an equidigital number, since it uses as much as digits as its factorization.

211200020197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4493617498.

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

The spelling of 211200020197 in words is "two hundred eleven billion, two hundred million, twenty thousand, one hundred ninety-seven".