211012221191 has 2 divisors, whose sum is σ = 211012221192. Its totient is φ = 211012221190.

The previous prime is 211012221187. The next prime is 211012221271. The reversal of 211012221191 is 191122210112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211012221191 - 2² = 211012221187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211012221491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506110595 + 105506110596.

It is an arithmetic number, because the mean of its divisors is an integer number (105506110596).

Almost surely, 2^211012221191 is an apocalyptic number.

211012221191 is a deficient number, since it is larger than the sum of its proper divisors (1).

211012221191 is an equidigital number, since it uses as much as digits as its factorization.

211012221191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 211012221191 in words is "two hundred eleven billion, twelve million, two hundred twenty-one thousand, one hundred ninety-one".