133204353421 has 16 divisors (see below), whose sum is σ = 140497407360. Its totient is φ = 126043822080.

The previous prime is 133204353409. The next prime is 133204353427. The reversal of 133204353421 is 124353402331.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 133204353421 - 2¹⁹ = 133203829133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133204353427) 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 in 15 ways as a sum of consecutive naturals, for example, 710761 + ... + 878401.

It is an arithmetic number, because the mean of its divisors is an integer number (8781087960).

Almost surely, 2^133204353421 is an apocalyptic number.

It is an amenable number.

133204353421 is a deficient number, since it is larger than the sum of its proper divisors (7293053939).

133204353421 is a wasteful number, since it uses less digits than its factorization.

133204353421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168036.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 133204353421 its reverse (124353402331), we get a palindrome (257557755752).

The spelling of 133204353421 in words is "one hundred thirty-three billion, two hundred four million, three hundred fifty-three thousand, four hundred twenty-one".