111121122020 has 24 divisors (see below), whose sum is σ = 238781203584. Its totient is φ = 43414763616.

The previous prime is 111121122001. The next prime is 111121122067. The reversal of 111121122020 is 20221121111.

It is a junction number, because it is equal to n+sod(n) for n = 111121121986 and 111121122004.

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, 64604444 + ... + 64606163.

It is an arithmetic number, because the mean of its divisors is an integer number (9949216816).

Almost surely, 2^111121122020 is an apocalyptic number.

111121122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111121122020 is an abundant number, since it is smaller than the sum of its proper divisors (127660081564).

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

111121122020 is a wasteful number, since it uses less digits than its factorization.

111121122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129210659 (or 129210657 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111121122020 its reverse (20221121111), we get a palindrome (131342243131).

Subtracting from 111121122020 its reverse (20221121111), we obtain a palindrome (90900000909).

The spelling of 111121122020 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, twenty".