11221086720 has 80 divisors (see below), whose sum is σ = 35872436160. Its totient is φ = 2992287744.

The previous prime is 11221086673. The next prime is 11221086761. The reversal of 11221086720 is 2768012211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 722860 + ... + 738219.

It is an arithmetic number, because the mean of its divisors is an integer number (448405452).

Almost surely, 2^11221086720 is an apocalyptic number.

11221086720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221086720 is an abundant number, since it is smaller than the sum of its proper divisors (24651349440).

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

11221086720 is an equidigital number, since it uses as much as digits as its factorization.

11221086720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461105 (or 1461089 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

Adding to 11221086720 its reverse (2768012211), we get a palindrome (13989098931).

The spelling of 11221086720 in words is "eleven billion, two hundred twenty-one million, eighty-six thousand, seven hundred twenty".