12521135051 has 8 divisors (see below), whose sum is σ = 12558778560. Its totient is φ = 12483523008.

The previous prime is 12521135023. The next prime is 12521135083. The reversal of 12521135051 is 15053112521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12521135051 - 2²⁶ = 12454026187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12521135051.

It is not an unprimeable number, because it can be changed into a prime (12521135021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 965015 + ... + 977903.

It is an arithmetic number, because the mean of its divisors is an integer number (1569847320).

Almost surely, 2^12521135051 is an apocalyptic number.

12521135051 is a deficient number, since it is larger than the sum of its proper divisors (37643509).

12521135051 is a wasteful number, since it uses less digits than its factorization.

12521135051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15733.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 12521135051 its reverse (15053112521), we get a palindrome (27574247572).

The spelling of 12521135051 in words is "twelve billion, five hundred twenty-one million, one hundred thirty-five thousand, fifty-one".