13211234320 has 20 divisors (see below), whose sum is σ = 30716119980. Its totient is φ = 5284493696.

The previous prime is 13211234243. The next prime is 13211234321. The reversal of 13211234320 is 2343211231.

It can be written as a sum of positive squares in 2 ways, for example, as 6981605136 + 6229629184 = 83556^2 + 78928^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 13211234291 and 13211234300.

It is not an unprimeable number, because it can be changed into a prime (13211234321) 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, 82570135 + ... + 82570294.

It is an arithmetic number, because the mean of its divisors is an integer number (1535805999).

Almost surely, 2^13211234320 is an apocalyptic number.

13211234320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13211234320 is an abundant number, since it is smaller than the sum of its proper divisors (17504885660).

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

13211234320 is a wasteful number, since it uses less digits than its factorization.

13211234320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165140442 (or 165140436 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 13211234320 its reverse (2343211231), we get a palindrome (15554445551).

The spelling of 13211234320 in words is "thirteen billion, two hundred eleven million, two hundred thirty-four thousand, three hundred twenty".