12153332521 has 32 divisors (see below), whose sum is σ = 14421431808. Its totient is φ = 10117232640.

The previous prime is 12153332507. The next prime is 12153332531. The reversal of 12153332521 is 12523335121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12153332521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12153332521.

It is not an unprimeable number, because it can be changed into a prime (12153332531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516501 + ... + 1524493.

It is an arithmetic number, because the mean of its divisors is an integer number (450669744).

Almost surely, 2^12153332521 is an apocalyptic number.

12153332521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12153332521 is a deficient number, since it is larger than the sum of its proper divisors (2268099287).

12153332521 is a wasteful number, since it uses less digits than its factorization.

12153332521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8241.

The product of its digits is 5400, while the sum is 28.

Adding to 12153332521 its reverse (12523335121), we get a palindrome (24676667642).

The spelling of 12153332521 in words is "twelve billion, one hundred fifty-three million, three hundred thirty-two thousand, five hundred twenty-one".