11265505221 has 8 divisors (see below), whose sum is σ = 15096155200. Its totient is φ = 7472596032.

The previous prime is 11265505219. The next prime is 11265505267. The reversal of 11265505221 is 12250556211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11265505221 - 2¹ = 11265505219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11265505021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9434500 + ... + 9435693.

It is an arithmetic number, because the mean of its divisors is an integer number (1887019400).

Almost surely, 2^11265505221 is an apocalyptic number.

It is an amenable number.

11265505221 is a deficient number, since it is larger than the sum of its proper divisors (3830649979).

11265505221 is a wasteful number, since it uses less digits than its factorization.

11265505221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18870395.

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 11265505221 in words is "eleven billion, two hundred sixty-five million, five hundred five thousand, two hundred twenty-one".