201172211 has 2 divisors, whose sum is σ = 201172212. Its totient is φ = 201172210.

The previous prime is 201172187. The next prime is 201172249. The reversal of 201172211 is 112271102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201172211 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201172211.

It is not a weakly prime, because it can be changed into another prime (201172261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100586105 + 100586106.

It is an arithmetic number, because the mean of its divisors is an integer number (100586106).

Almost surely, 2^201172211 is an apocalyptic number.

201172211 is a deficient number, since it is larger than the sum of its proper divisors (1).

201172211 is an equidigital number, since it uses as much as digits as its factorization.

201172211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 201172211 is about 14183.5189921260. The cubic root of 201172211 is about 585.9438446735.

The spelling of 201172211 in words is "two hundred one million, one hundred seventy-two thousand, two hundred eleven".