33421121 has 2 divisors, whose sum is σ = 33421122. Its totient is φ = 33421120.

The previous prime is 33421103. The next prime is 33421123. The reversal of 33421121 is 12112433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30924721 + 2496400 = 5561^2 + 1580^2 .

It is an emirp because it is prime and its reverse (12112433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33421121 - 2¹⁰ = 33420097 is a prime.

It is a super-2 number, since 2×33421121² = 2233942657793282, which contains 22 as substring.

Together with 33421123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33421121.

It is not a weakly prime, because it can be changed into another prime (33421123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16710560 + 16710561.

It is an arithmetic number, because the mean of its divisors is an integer number (16710561).

Almost surely, 2^33421121 is an apocalyptic number.

It is an amenable number.

33421121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33421121 is an equidigital number, since it uses as much as digits as its factorization.

33421121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 17.

The square root of 33421121 is about 5781.1003277923. The cubic root of 33421121 is about 322.1120740746.

Adding to 33421121 its reverse (12112433), we get a palindrome (45533554).

The spelling of 33421121 in words is "thirty-three million, four hundred twenty-one thousand, one hundred twenty-one".