11211000091 has 2 divisors, whose sum is σ = 11211000092. Its totient is φ = 11211000090.

The previous prime is 11211000023. The next prime is 11211000113. The reversal of 11211000091 is 19000011211.

It is a strong prime.

It is an emirp because it is prime and its reverse (19000011211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211000091 - 2¹³ = 11210991899 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211000011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605500045 + 5605500046.

It is an arithmetic number, because the mean of its divisors is an integer number (5605500046).

Almost surely, 2^11211000091 is an apocalyptic number.

11211000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211000091 is an equidigital number, since it uses as much as digits as its factorization.

11211000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 11211000091 in words is "eleven billion, two hundred eleven million, ninety-one", and thus it is an aban number.