12500000521 has 2 divisors, whose sum is σ = 12500000522. Its totient is φ = 12500000520.

The previous prime is 12500000519. The next prime is 12500000531.

12500000521 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6955560000 + 5544440521 = 83400^2 + 74461^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12500000521 - 2¹ = 12500000519 is a prime.

Together with 12500000519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12500000495 and 12500000504.

It is not a weakly prime, because it can be changed into another prime (12500000531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250000260 + 6250000261.

It is an arithmetic number, because the mean of its divisors is an integer number (6250000261).

Almost surely, 2^12500000521 is an apocalyptic number.

It is an amenable number.

12500000521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12500000521 is an equidigital number, since it uses as much as digits as its factorization.

12500000521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

It can be divided in two parts, 12500000 and 521, that added together give a palindrome (12500521).

The spelling of 12500000521 in words is "twelve billion, five hundred million, five hundred twenty-one", and thus it is an aban number.