12520000001 has 2 divisors, whose sum is σ = 12520000002. Its totient is φ = 12520000000.

The previous prime is 12519999971. The next prime is 12520000007. The reversal of 12520000001 is 10000002521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9782199025 + 2737800976 = 98905^2 + 52324^2 .

It is an emirp because it is prime and its reverse (10000002521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12520000001 - 2⁶ = 12519999937 is a prime.

It is not a weakly prime, because it can be changed into another prime (12520000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260000000 + 6260000001.

It is an arithmetic number, because the mean of its divisors is an integer number (6260000001).

Almost surely, 2^12520000001 is an apocalyptic number.

It is an amenable number.

12520000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520000001 is an equidigital number, since it uses as much as digits as its factorization.

12520000001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 11.

Adding to 12520000001 its reverse (10000002521), we get a palindrome (22520002522).

The spelling of 12520000001 in words is "twelve billion, five hundred twenty million, one", and thus it is an aban number.