12013203220 has 12 divisors (see below), whose sum is σ = 25227726804. Its totient is φ = 4805281280.

The previous prime is 12013203151. The next prime is 12013203227. The reversal of 12013203220 is 2230231021.

It can be written as a sum of positive squares in 2 ways, for example, as 8579946384 + 3433256836 = 92628^2 + 58594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12013203194 and 12013203203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013203227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300330061 + ... + 300330100.

It is an arithmetic number, because the mean of its divisors is an integer number (2102310567).

Almost surely, 2^12013203220 is an apocalyptic number.

12013203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12013203220 is an abundant number, since it is smaller than the sum of its proper divisors (13214523584).

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

12013203220 is a wasteful number, since it uses less digits than its factorization.

12013203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600660170 (or 600660168 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12013203220 its reverse (2230231021), we get a palindrome (14243434241).

The spelling of 12013203220 in words is "twelve billion, thirteen million, two hundred three thousand, two hundred twenty".