12121633 has 4 divisors (see below), whose sum is σ = 12128688. Its totient is φ = 12114580.

The previous prime is 12121631. The next prime is 12121661. The reversal of 12121633 is 33612121.

12121633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 12121633 - 2¹ = 12121631 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 12121633.

It is not an unprimeable number, because it can be changed into a prime (12121631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918 + ... + 5008.

It is an arithmetic number, because the mean of its divisors is an integer number (3032172).

Almost surely, 2^12121633 is an apocalyptic number.

It is an amenable number.

12121633 is a deficient number, since it is larger than the sum of its proper divisors (7055).

12121633 is an equidigital number, since it uses as much as digits as its factorization.

12121633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7054.

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

The square root of 12121633 is about 3481.6135627034. The cubic root of 12121633 is about 229.7137775449.

Adding to 12121633 its reverse (33612121), we get a palindrome (45733754).

The spelling of 12121633 in words is "twelve million, one hundred twenty-one thousand, six hundred thirty-three".