111001221120 has 96 divisors (see below), whose sum is σ = 355117286160. Its totient is φ = 29600317440.

The previous prime is 111001221109. The next prime is 111001221161. The reversal of 111001221120 is 21122100111.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×111001221120² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111001221096 and 111001221105.

It is a congruent number.

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, 1775941 + ... + 1837380.

Almost surely, 2^111001221120 is an apocalyptic number.

111001221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001221120 is an abundant number, since it is smaller than the sum of its proper divisors (244116065040).

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

111001221120 is an equidigital number, since it uses as much as digits as its factorization.

111001221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613351 (or 3613331 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111001221120 its reverse (21122100111), we get a palindrome (132123321231).

The spelling of 111001221120 in words is "one hundred eleven billion, one million, two hundred twenty-one thousand, one hundred twenty".