12521115131 has 8 divisors (see below), whose sum is σ = 14311930080. Its totient is φ = 10730821248.

The previous prime is 12521115053. The next prime is 12521115149. The reversal of 12521115131 is 13151112521.

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

It is a de Polignac number, because none of the positive numbers 2^k-12521115131 is a prime.

It is a super-2 number, since 2×12521115131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12521115097 and 12521115106.

It is not an unprimeable number, because it can be changed into a prime (12521115181) 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, 77336 + ... + 176133.

It is an arithmetic number, because the mean of its divisors is an integer number (1788991260).

Almost surely, 2^12521115131 is an apocalyptic number.

12521115131 is a deficient number, since it is larger than the sum of its proper divisors (1790814949).

12521115131 is an equidigital number, since it uses as much as digits as its factorization.

12521115131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260533.

The product of its digits is 300, while the sum is 23.

Adding to 12521115131 its reverse (13151112521), we get a palindrome (25672227652).

The spelling of 12521115131 in words is "twelve billion, five hundred twenty-one million, one hundred fifteen thousand, one hundred thirty-one".