111002122020 has 96 divisors (see below), whose sum is σ = 322268123520. Its totient is φ = 28513658880.

The previous prime is 111002122009. The next prime is 111002122027. The reversal of 111002122020 is 20221200111.

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 = 111002121987 and 111002122005.

It is not an unprimeable number, because it can be changed into a prime (111002122027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 679755 + ... + 827085.

It is an arithmetic number, because the mean of its divisors is an integer number (3356959620).

Almost surely, 2^111002122020 is an apocalyptic number.

111002122020 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 111002122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161134061760).

111002122020 is an abundant number, since it is smaller than the sum of its proper divisors (211266001500).

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

111002122020 is a wasteful number, since it uses less digits than its factorization.

111002122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147805 (or 147803 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111002122020 its reverse (20221200111), we get a palindrome (131223322131).

The spelling of 111002122020 in words is "one hundred eleven billion, two million, one hundred twenty-two thousand, twenty".