111242102020 has 144 divisors (see below), whose sum is σ = 287985559680. Its totient is φ = 35865209856.

The previous prime is 111242102011. The next prime is 111242102029. The reversal of 111242102020 is 20201242111.

It is an interprime number because it is at equal distance from previous prime (111242102011) and next prime (111242102029).

It is a junction number, because it is equal to n+sod(n) for n = 111242101985 and 111242102003.

It is not an unprimeable number, because it can be changed into a prime (111242102029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25970799 + ... + 25975081.

It is an arithmetic number, because the mean of its divisors is an integer number (1999899720).

Almost surely, 2^111242102020 is an apocalyptic number.

111242102020 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 111242102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143992779840).

111242102020 is an abundant number, since it is smaller than the sum of its proper divisors (176743457660).

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

111242102020 is a wasteful number, since it uses less digits than its factorization.

111242102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882 (or 5873 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 111242102020 its reverse (20201242111), we get a palindrome (131443344131).

The spelling of 111242102020 in words is "one hundred eleven billion, two hundred forty-two million, one hundred two thousand, twenty".