11111090221 has 16 divisors (see below), whose sum is σ = 14174949888. Its totient is φ = 8456641200.

The previous prime is 11111090191. The next prime is 11111090293. The reversal of 11111090221 is 12209011111.

It is not a de Polignac number, because 11111090221 - 2¹⁵ = 11111057453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111090021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1674595 + ... + 1681216.

It is an arithmetic number, because the mean of its divisors is an integer number (885934368).

Almost surely, 2^11111090221 is an apocalyptic number.

11111090221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11111090221 is a deficient number, since it is larger than the sum of its proper divisors (3063859667).

11111090221 is a wasteful number, since it uses less digits than its factorization.

11111090221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355872.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 11111090221 in words is "eleven billion, one hundred eleven million, ninety thousand, two hundred twenty-one".