12013313220 has 72 divisors (see below), whose sum is σ = 37696964760. Its totient is φ = 3093081600.

The previous prime is 12013313209. The next prime is 12013313237. The reversal of 12013313220 is 2231331021.

12013313220 is a `hidden beast` number, since 12 + 0 + 1 + 331 + 322 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3620188224 + 8393124996 = 60168^2 + 91614^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12013313193 and 12013313202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1145481 + ... + 1155920.

It is an arithmetic number, because the mean of its divisors is an integer number (523568955).

Almost surely, 2^12013313220 is an apocalyptic number.

12013313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12013313220 is an abundant number, since it is smaller than the sum of its proper divisors (25683651540).

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

12013313220 is a wasteful number, since it uses less digits than its factorization.

12013313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301445 (or 2301440 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12013313220 its reverse (2231331021), we get a palindrome (14244644241).

The spelling of 12013313220 in words is "twelve billion, thirteen million, three hundred thirteen thousand, two hundred twenty".