11221045555 has 32 divisors (see below), whose sum is σ = 14320088640. Its totient is φ = 8417157120.

The previous prime is 11221045543. The next prime is 11221045601. The reversal of 11221045555 is 55554012211.

11221045555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11221045555 - 2⁵ = 11221045523 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3959419 + ... + 3962251.

It is an arithmetic number, because the mean of its divisors is an integer number (447502770).

Almost surely, 2^11221045555 is an apocalyptic number.

11221045555 is a deficient number, since it is larger than the sum of its proper divisors (3099043085).

11221045555 is a wasteful number, since it uses less digits than its factorization.

11221045555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 11221045555 its reverse (55554012211), we get a palindrome (66775057766).

The spelling of 11221045555 in words is "eleven billion, two hundred twenty-one million, forty-five thousand, five hundred fifty-five".