12011000020 has 24 divisors (see below), whose sum is σ = 25838299368. Its totient is φ = 4687219200.

The previous prime is 12011000011. The next prime is 12011000041. The reversal of 12011000020 is 2000011021.

12011000020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 339222724 + 11671777296 = 18418^2 + 108036^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12010999967 and 12011000012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7322961 + ... + 7324600.

It is an arithmetic number, because the mean of its divisors is an integer number (1076595807).

Almost surely, 2^12011000020 is an apocalyptic number.

12011000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011000020 is an abundant number, since it is smaller than the sum of its proper divisors (13827299348).

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

12011000020 is a wasteful number, since it uses less digits than its factorization.

12011000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14647611 (or 14647609 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 12011000020 its reverse (2000011021), we get a palindrome (14011011041).

The spelling of 12011000020 in words is "twelve billion, eleven million, twenty", and thus it is an aban number and an uban number.