201211943 has 2 divisors, whose sum is σ = 201211944. Its totient is φ = 201211942.

The previous prime is 201211909. The next prime is 201211951. The reversal of 201211943 is 349112102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201211943 - 2⁸ = 201211687 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605971 + 100605972.

It is an arithmetic number, because the mean of its divisors is an integer number (100605972).

Almost surely, 2^201211943 is an apocalyptic number.

201211943 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211943 is an equidigital number, since it uses as much as digits as its factorization.

201211943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 201211943 is about 14184.9195626905. The cubic root of 201211943 is about 585.9824172447.

The spelling of 201211943 in words is "two hundred one million, two hundred eleven thousand, nine hundred forty-three".