11191089220 has 24 divisors (see below), whose sum is σ = 23503310208. Its totient is φ = 4476050400.

The previous prime is 11191089209. The next prime is 11191089253. The reversal of 11191089220 is 2298019111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377125 + ... + 405715.

It is an arithmetic number, because the mean of its divisors is an integer number (979304592).

Almost surely, 2^11191089220 is an apocalyptic number.

11191089220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11191089220 is an abundant number, since it is smaller than the sum of its proper divisors (12312220988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11191089220 is a wasteful number, since it uses less digits than its factorization.

11191089220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48171 (or 48169 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 11191089220 in words is "eleven billion, one hundred ninety-one million, eighty-nine thousand, two hundred twenty".