11208891211 has 4 divisors (see below), whose sum is σ = 12810161392. Its totient is φ = 9607621032.

The previous prime is 11208891173. The next prime is 11208891223. The reversal of 11208891211 is 11219880211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11208891211 - 2¹⁵ = 11208858443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11208891241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800635080 + ... + 800635093.

It is an arithmetic number, because the mean of its divisors is an integer number (3202540348).

Almost surely, 2^11208891211 is an apocalyptic number.

11208891211 is a deficient number, since it is larger than the sum of its proper divisors (1601270181).

11208891211 is an equidigital number, since it uses as much as digits as its factorization.

11208891211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601270180.

The product of its (nonzero) digits is 2304, while the sum is 34.

The spelling of 11208891211 in words is "eleven billion, two hundred eight million, eight hundred ninety-one thousand, two hundred eleven".