111021100120 has 64 divisors (see below), whose sum is σ = 285597446400. Its totient is φ = 38049095040.

The previous prime is 111021100111. The next prime is 111021100139. The reversal of 111021100120 is 21001120111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 111021100097 and 111021100106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630351 + ... + 787009.

It is an arithmetic number, because the mean of its divisors is an integer number (4462460100).

Almost surely, 2^111021100120 is an apocalyptic number.

111021100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021100120 is an abundant number, since it is smaller than the sum of its proper divisors (174576346280).

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

111021100120 is a wasteful number, since it uses less digits than its factorization.

111021100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159208 (or 159204 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111021100120 its reverse (21001120111), we get a palindrome (132022220231).

The spelling of 111021100120 in words is "one hundred eleven billion, twenty-one million, one hundred thousand, one hundred twenty".