12011043220 has 144 divisors (see below), whose sum is σ = 28267528464. Its totient is φ = 4283136000.

The previous prime is 12011043181. The next prime is 12011043281. The reversal of 12011043220 is 2234011021.

It can be written as a sum of positive squares in 8 ways, for example, as 663680644 + 11347362576 = 25762^2 + 106524^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12011043194 and 12011043203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38373784 + ... + 38374096.

It is an arithmetic number, because the mean of its divisors is an integer number (196302281).

Almost surely, 2^12011043220 is an apocalyptic number.

12011043220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011043220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14133764232).

12011043220 is an abundant number, since it is smaller than the sum of its proper divisors (16256485244).

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

12011043220 is a wasteful number, since it uses less digits than its factorization.

12011043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12011043220 its reverse (2234011021), we get a palindrome (14245054241).

The spelling of 12011043220 in words is "twelve billion, eleven million, forty-three thousand, two hundred twenty".