12509781102 has 160 divisors (see below), whose sum is σ = 34606387200. Its totient is φ = 3289108032.

The previous prime is 12509781091. The next prime is 12509781103. The reversal of 12509781102 is 20118790521.

It is a happy number.

12509781102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509781103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5586099 + ... + 5588337.

It is an arithmetic number, because the mean of its divisors is an integer number (216289920).

Almost surely, 2^12509781102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12509781102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17303193600).

12509781102 is an abundant number, since it is smaller than the sum of its proper divisors (22096606098).

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

12509781102 is a wasteful number, since it uses less digits than its factorization.

12509781102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The spelling of 12509781102 in words is "twelve billion, five hundred nine million, seven hundred eighty-one thousand, one hundred two".