33402121 has 2 divisors, whose sum is σ = 33402122. Its totient is φ = 33402120.

The previous prime is 33402119. The next prime is 33402139. The reversal of 33402121 is 12120433.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 10169721 = 4820^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 33402121 - 2¹ = 33402119 is a prime.

It is a super-2 number, since 2×33402121² = 2231403374597282, which contains 22 as substring.

Together with 33402119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 33402095 and 33402104.

It is not a weakly prime, because it can be changed into another prime (33402191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16701060 + 16701061.

It is an arithmetic number, because the mean of its divisors is an integer number (16701061).

Almost surely, 2^33402121 is an apocalyptic number.

It is an amenable number.

33402121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33402121 is an equidigital number, since it uses as much as digits as its factorization.

33402121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 33402121 is about 5779.4568083861. The cubic root of 33402121 is about 322.0510219678.

Adding to 33402121 its reverse (12120433), we get a palindrome (45522554).

The spelling of 33402121 in words is "thirty-three million, four hundred two thousand, one hundred twenty-one".