13231013220 has 144 divisors (see below), whose sum is σ = 40727232000. Its totient is φ = 3476318976.

The previous prime is 13231013209. The next prime is 13231013233. The reversal of 13231013220 is 2231013231.

13231013220 is a `hidden beast` number, since 1 + 32 + 310 + 1 + 322 + 0 = 666.

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 = 13231013193 and 13231013202.

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, 11930026 + ... + 11931134.

It is an arithmetic number, because the mean of its divisors is an integer number (282828000).

Almost surely, 2^13231013220 is an apocalyptic number.

13231013220 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 13231013220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20363616000).

13231013220 is an abundant number, since it is smaller than the sum of its proper divisors (27496218780).

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

13231013220 is a wasteful number, since it uses less digits than its factorization.

13231013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 2037 counting only the distinct ones).

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

Adding to 13231013220 its reverse (2231013231), we get a palindrome (15462026451).

It can be divided in two parts, 132310 and 13220, that added together give a triangular number (145530 = T₅₃₉).

The spelling of 13231013220 in words is "thirteen billion, two hundred thirty-one million, thirteen thousand, two hundred twenty".