12633121 has 4 divisors (see below), whose sum is σ = 12640432. Its totient is φ = 12625812.

The previous prime is 12633109. The next prime is 12633143. The reversal of 12633121 is 12133621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12633121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12633191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550 + ... + 5056.

It is an arithmetic number, because the mean of its divisors is an integer number (3160108).

Almost surely, 2^12633121 is an apocalyptic number.

It is an amenable number.

12633121 is a deficient number, since it is larger than the sum of its proper divisors (7311).

12633121 is an equidigital number, since it uses as much as digits as its factorization.

12633121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7310.

The product of its digits is 216, while the sum is 19.

The square root of 12633121 is about 3554.3102003061. The cubic root of 12633121 is about 232.9003915196.

Adding to 12633121 its reverse (12133621), we get a palindrome (24766742).

Subtracting from 12633121 its reverse (12133621), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 12633121 in words is "twelve million, six hundred thirty-three thousand, one hundred twenty-one".