13111025512 has 64 divisors (see below), whose sum is σ = 27427554000. Its totient is φ = 5833949184.

The previous prime is 13111025453. The next prime is 13111025527. The reversal of 13111025512 is 21552011131.

It can be written as a sum of positive squares in 8 ways, for example, as 5420787876 + 7690237636 = 73626^2 + 87694^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2316478 + ... + 2322130.

Almost surely, 2^13111025512 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 13111025512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13713777000).

13111025512 is an abundant number, since it is smaller than the sum of its proper divisors (14316528488).

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

13111025512 is a wasteful number, since it uses less digits than its factorization.

13111025512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470 (or 6466 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 22.

Adding to 13111025512 its reverse (21552011131), we get a palindrome (34663036643).

The spelling of 13111025512 in words is "thirteen billion, one hundred eleven million, twenty-five thousand, five hundred twelve".