12533021332421 has 8 divisors (see below), whose sum is σ = 12613169651544. Its totient is φ = 12452877066240.

The previous prime is 12533021332417. The next prime is 12533021332451. The reversal of 12533021332421 is 12423312033521.

It can be written as a sum of positive squares in 4 ways, for example, as 5060188225 + 12527961144196 = 71135^2 + 3539486^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12533021332421 - 2² = 12533021332417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12533021332451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5317241 + ... + 7303361.

It is an arithmetic number, because the mean of its divisors is an integer number (1576646206443).

Almost surely, 2^{12533021332421} is an apocalyptic number.

It is an amenable number.

12533021332421 is a deficient number, since it is larger than the sum of its proper divisors (80148319123).

12533021332421 is a wasteful number, since it uses less digits than its factorization.

12533021332421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026471.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 12533021332421 its reverse (12423312033521), we get a palindrome (24956333365942).

The spelling of 12533021332421 in words is "twelve trillion, five hundred thirty-three billion, twenty-one million, three hundred thirty-two thousand, four hundred twenty-one".