12011020 has 24 divisors (see below), whose sum is σ = 28826784.
Its totient is φ = 4118016.
The previous prime is 12011009. The next prime is 12011029. The reversal of 12011020 is 2011021.
Adding to 12011020 its reverse (2011021), we get a palindrome (14022041).
Subtracting from 12011020 its reverse (2011021), we obtain a palindrome (9999999).
It is a Harshad number since it is a multiple of its sum of digits (7).
It is a junction number, because it is equal to n+sod(n) for n = 12010994 and 12011012.
It is not an unprimeable number, because it can be changed into a prime (12011029) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42757 + ... + 43036.
It is an arithmetic number, because the mean of its divisors is an integer number (1201116).
Almost surely, 212011020 is an apocalyptic number.
12011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
12011020 is an abundant number, since it is smaller than the sum of its proper divisors (16815764).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12011020 is a wasteful number, since it uses less digits than its factorization.
12011020 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 85809 (or 85807 counting only the distinct ones).
The product of its (nonzero) digits is 4, while the sum is 7.
The square root of 12011020 is about 3465.6918501217.
The cubic root of 12011020 is about 229.0129090185.
The spelling of 12011020 in words is "twelve million, eleven thousand, twenty".