111111122112020 has 24 divisors (see below), whose sum is σ = 233781213187368. Its totient is φ = 44359142796800.

The previous prime is 111111122111971. The next prime is 111111122112047. The reversal of 111111122112020 is 20211221111111.

It can be written as a sum of positive squares in 4 ways, for example, as 76599418756 + 111034522693264 = 276766^2 + 10537292^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111111122112020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5331617321 + ... + 5331638160.

It is an arithmetic number, because the mean of its divisors is an integer number (9740883882807).

Almost surely, 2^{111111122112020} is an apocalyptic number.

111111122112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111122112020 is an abundant number, since it is smaller than the sum of its proper divisors (122670091075348).

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

111111122112020 is a wasteful number, since it uses less digits than its factorization.

111111122112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10663256011 (or 10663256009 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111111122112020 its reverse (20211221111111), we get a palindrome (131322343223131).

The spelling of 111111122112020 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twelve thousand, twenty".