111102120120 has 64 divisors (see below), whose sum is σ = 333357599520. Its totient is φ = 29622677504.

The previous prime is 111102120119. The next prime is 111102120121. The reversal of 111102120120 is 21021201111.

It is an interprime number because it is at equal distance from previous prime (111102120119) and next prime (111102120121).

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 = 111102120096 and 111102120105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102120121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752212 + ... + 887708.

Almost surely, 2^111102120120 is an apocalyptic number.

111102120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111102120120 is an abundant number, since it is smaller than the sum of its proper divisors (222255479400).

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

111102120120 is a wasteful number, since it uses less digits than its factorization.

111102120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142344 (or 142340 counting only the distinct ones).

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

Adding to 111102120120 its reverse (21021201111), we get a palindrome (132123321231).

The spelling of 111102120120 in words is "one hundred eleven billion, one hundred two million, one hundred twenty thousand, one hundred twenty".