111211122020 has 24 divisors (see below), whose sum is σ = 234011400000. Its totient is φ = 44395297632.

The previous prime is 111211122017. The next prime is 111211122073. The reversal of 111211122020 is 20221112111.

It is a junction number, because it is equal to n+sod(n) for n = 111211121986 and 111211122004.

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, 5561720 + ... + 5581679.

It is an arithmetic number, because the mean of its divisors is an integer number (9750475000).

Almost surely, 2^111211122020 is an apocalyptic number.

111211122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211122020 is an abundant number, since it is smaller than the sum of its proper divisors (122800277980).

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

111211122020 is a wasteful number, since it uses less digits than its factorization.

111211122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11143907 (or 11143905 counting only the distinct ones).

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

Adding to 111211122020 its reverse (20221112111), we get a palindrome (131432234131).

Subtracting from 111211122020 its reverse (20221112111), we obtain a palindrome (90990009909).

The spelling of 111211122020 in words is "one hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, twenty".