11112001220 has 48 divisors (see below), whose sum is σ = 23919840000. Its totient is φ = 4333582080.

The previous prime is 11112001217. The next prime is 11112001289. The reversal of 11112001220 is 2210021111.

11112001220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11112001220² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 1635791 + ... + 1642569.

It is an arithmetic number, because the mean of its divisors is an integer number (498330000).

Almost surely, 2^11112001220 is an apocalyptic number.

11112001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112001220 is an abundant number, since it is smaller than the sum of its proper divisors (12807838780).

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

11112001220 is a wasteful number, since it uses less digits than its factorization.

11112001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8828 (or 8826 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11112001220 its reverse (2210021111), we get a palindrome (13322022331).

The spelling of 11112001220 in words is "eleven billion, one hundred twelve million, one thousand, two hundred twenty".