111002111020 has 96 divisors (see below), whose sum is σ = 246193831296. Its totient is φ = 41956147200.

The previous prime is 111002110939. The next prime is 111002111063. The reversal of 111002111020 is 20111200111.

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 = 111002110988 and 111002111006.

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 31 ways as a sum of consecutive naturals, for example, 28599480 + ... + 28603360.

It is an arithmetic number, because the mean of its divisors is an integer number (2564519076).

Almost surely, 2^111002111020 is an apocalyptic number.

111002111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111002111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123096915648).

111002111020 is an abundant number, since it is smaller than the sum of its proper divisors (135191720276).

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

111002111020 is a wasteful number, since it uses less digits than its factorization.

111002111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651 (or 4649 counting only the distinct ones).

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

Adding to 111002111020 its reverse (20111200111), we get a palindrome (131113311131).

The spelling of 111002111020 in words is "one hundred eleven billion, two million, one hundred eleven thousand, twenty".