111112211020 has 12 divisors (see below), whose sum is σ = 233335643184. Its totient is φ = 44444884400.

The previous prime is 111112211009. The next prime is 111112211057. The reversal of 111112211020 is 20112211111.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777805256 + ... + 2777805295.

It is an arithmetic number, because the mean of its divisors is an integer number (19444636932).

Almost surely, 2^111112211020 is an apocalyptic number.

111112211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111112211020 is an abundant number, since it is smaller than the sum of its proper divisors (122223432164).

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

111112211020 is a wasteful number, since it uses less digits than its factorization.

111112211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555610560 (or 5555610558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111112211020 its reverse (20112211111), we get a palindrome (131224422131).

Subtracting from 111112211020 its reverse (20112211111), we obtain a palindrome (90999999909).

The spelling of 111112211020 in words is "one hundred eleven billion, one hundred twelve million, two hundred eleven thousand, twenty".