111221111120 has 80 divisors (see below), whose sum is σ = 298456576128. Its totient is φ = 37755379200.

The previous prime is 111221111119. The next prime is 111221111147. The reversal of 111221111120 is 21111122111.

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 (14).

It is a junction number, because it is equal to n+sod(n) for n = 111221111095 and 111221111104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926654 + ... + 1039773.

Almost surely, 2^111221111120 is an apocalyptic number.

111221111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221111120 is an abundant number, since it is smaller than the sum of its proper divisors (187235465008).

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

111221111120 is a wasteful number, since it uses less digits than its factorization.

111221111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966548 (or 1966542 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111221111120 its reverse (21111122111), we get a palindrome (132332233231).

The spelling of 111221111120 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty".