13112213504 has 64 divisors (see below), whose sum is σ = 28242177180. Its totient is φ = 6051594240.

The previous prime is 13112213479. The next prime is 13112213507. The reversal of 13112213504 is 40531221131.

It can be written as a sum of positive squares in 2 ways, for example, as 11588091904 + 1524121600 = 107648^2 + 39040^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 13112213504.

It is not an unprimeable number, because it can be changed into a prime (13112213507) 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, 410594 + ... + 441374.

Almost surely, 2^13112213504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13112213504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14121088590).

13112213504 is an abundant number, since it is smaller than the sum of its proper divisors (15129963676).

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

13112213504 is an frugal number, since it uses more digits than its factorization.

13112213504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30824 (or 30796 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 13112213504 its reverse (40531221131), we get a palindrome (53643434635).

The spelling of 13112213504 in words is "thirteen billion, one hundred twelve million, two hundred thirteen thousand, five hundred four".