111321100120 has 16 divisors (see below), whose sum is σ = 250472475360. Its totient is φ = 44528440032.

The previous prime is 111321100117. The next prime is 111321100133. The reversal of 111321100120 is 21001123111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 111321100120.

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 3 ways as a sum of consecutive naturals, for example, 1391513712 + ... + 1391513791.

It is an arithmetic number, because the mean of its divisors is an integer number (15654529710).

Almost surely, 2^111321100120 is an apocalyptic number.

111321100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111321100120 is an abundant number, since it is smaller than the sum of its proper divisors (139151375240).

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

111321100120 is a wasteful number, since it uses less digits than its factorization.

111321100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783027514 (or 2783027510 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 111321100120 its reverse (21001123111), we get a palindrome (132322223231).

The spelling of 111321100120 in words is "one hundred eleven billion, three hundred twenty-one million, one hundred thousand, one hundred twenty".