211240212091 has 2 divisors, whose sum is σ = 211240212092. Its totient is φ = 211240212090.

The previous prime is 211240212067. The next prime is 211240212107. The reversal of 211240212091 is 190212042112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211240212091 - 2²³ = 211231823483 is a prime.

It is not a weakly prime, because it can be changed into another prime (211240212041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105620106045 + 105620106046.

It is an arithmetic number, because the mean of its divisors is an integer number (105620106046).

Almost surely, 2^211240212091 is an apocalyptic number.

211240212091 is a deficient number, since it is larger than the sum of its proper divisors (1).

211240212091 is an equidigital number, since it uses as much as digits as its factorization.

211240212091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 211240212091 in words is "two hundred eleven billion, two hundred forty million, two hundred twelve thousand, ninety-one".