111111121122020 has 24 divisors (see below), whose sum is σ = 233334986365824. Its totient is φ = 44444137589856.

The previous prime is 111111121121951. The next prime is 111111121122077. The reversal of 111111121122020 is 20221121111111.

It is a self number, because there is not a number n which added to its sum of digits gives 111111121122020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16486874 + ... + 22226993.

It is an arithmetic number, because the mean of its divisors is an integer number (9722291098576).

Almost surely, 2^{111111121122020} is an apocalyptic number.

111111121122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111121122020 is an abundant number, since it is smaller than the sum of its proper divisors (122223865243804).

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

111111121122020 is a wasteful number, since it uses less digits than its factorization.

111111121122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38857379 (or 38857377 counting only the distinct ones).

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

Adding to 111111121122020 its reverse (20221121111111), we get a palindrome (131332242233131).

The spelling of 111111121122020 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, twenty".