111011121020 has 48 divisors (see below), whose sum is σ = 245593706400. Its totient is φ = 42032966400.

The previous prime is 111011121019. The next prime is 111011121041. The reversal of 111011121020 is 20121110111.

111011121020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 111011120992 and 111011121010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348170 + ... + 585870.

It is an arithmetic number, because the mean of its divisors is an integer number (5116535550).

Almost surely, 2^111011121020 is an apocalyptic number.

111011121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111011121020 is an abundant number, since it is smaller than the sum of its proper divisors (134582585380).

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

111011121020 is a wasteful number, since it uses less digits than its factorization.

111011121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238958 (or 238956 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111011121020 its reverse (20121110111), we get a palindrome (131132231131).

The spelling of 111011121020 in words is "one hundred eleven billion, eleven million, one hundred twenty-one thousand, twenty".