12535530340221 has 12 divisors (see below), whose sum is σ = 20693573895072. Its totient is φ = 7163160194376.

The previous prime is 12535530340147. The next prime is 12535530340261. The reversal of 12535530340221 is 12204303553521.

12535530340221 is a `hidden beast` number, since 1 + 2 + 53 + 553 + 0 + 34 + 0 + 2 + 21 = 666.

It is not a de Polignac number, because 12535530340221 - 2¹⁰ = 12535530339197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12535530340261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99488335971 + ... + 99488336096.

It is an arithmetic number, because the mean of its divisors is an integer number (1724464491256).

Almost surely, 2^{12535530340221} is an apocalyptic number.

It is an amenable number.

12535530340221 is a deficient number, since it is larger than the sum of its proper divisors (8158043554851).

12535530340221 is a wasteful number, since it uses less digits than its factorization.

12535530340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198976672080 (or 198976672077 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 12535530340221 its reverse (12204303553521), we get a palindrome (24739833893742).

The spelling of 12535530340221 in words is "twelve trillion, five hundred thirty-five billion, five hundred thirty million, three hundred forty thousand, two hundred twenty-one".