12521552201 has 4 divisors (see below), whose sum is σ = 12570274452. Its totient is φ = 12472829952.

The previous prime is 12521552171. The next prime is 12521552207. The reversal of 12521552201 is 10225512521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10782745600 + 1738806601 = 103840^2 + 41699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12521552201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12521552207) 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 3 ways as a sum of consecutive naturals, for example, 24360740 + ... + 24361253.

It is an arithmetic number, because the mean of its divisors is an integer number (3142568613).

Almost surely, 2^12521552201 is an apocalyptic number.

It is an amenable number.

12521552201 is a deficient number, since it is larger than the sum of its proper divisors (48722251).

12521552201 is an equidigital number, since it uses as much as digits as its factorization.

12521552201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48722250.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 12521552201 in words is "twelve billion, five hundred twenty-one million, five hundred fifty-two thousand, two hundred one".