12521113501 has 12 divisors (see below), whose sum is σ = 13924814772. Its totient is φ = 11245568256.

The previous prime is 12521113499. The next prime is 12521113511. The reversal of 12521113501 is 10531112521.

12521113501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 948948025 + 11572165476 = 30805^2 + 107574^2 .

It is not a de Polignac number, because 12521113501 - 2¹ = 12521113499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521113511) 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 11 ways as a sum of consecutive naturals, for example, 994956 + ... + 1007461.

It is an arithmetic number, because the mean of its divisors is an integer number (1160401231).

Almost surely, 2^12521113501 is an apocalyptic number.

It is an amenable number.

12521113501 is a deficient number, since it is larger than the sum of its proper divisors (1403701271).

12521113501 is a wasteful number, since it uses less digits than its factorization.

12521113501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002480 (or 2002467 counting only the distinct ones).

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

The spelling of 12521113501 in words is "twelve billion, five hundred twenty-one million, one hundred thirteen thousand, five hundred one".