111111001012220 has 24 divisors (see below), whose sum is σ = 254545202319408. Its totient is φ = 40404000368000.

The previous prime is 111111001012177. The next prime is 111111001012237. The reversal of 111111001012220 is 22210100111111.

It is a junction number, because it is equal to n+sod(n) for n = 111111001012195 and 111111001012204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252525002081 + ... + 252525002520.

It is an arithmetic number, because the mean of its divisors is an integer number (10606050096642).

Almost surely, 2^{111111001012220} is an apocalyptic number.

111111001012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111001012220 is an abundant number, since it is smaller than the sum of its proper divisors (143434201307188).

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

111111001012220 is a wasteful number, since it uses less digits than its factorization.

111111001012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505050004621 (or 505050004619 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111111001012220 its reverse (22210100111111), we get a palindrome (133321101123331).

The spelling of 111111001012220 in words is "one hundred eleven trillion, one hundred eleven billion, one million, twelve thousand, two hundred twenty".