133312421 has 8 divisors (see below), whose sum is σ = 147273600. Its totient is φ = 119658240.

The previous prime is 133312373. The next prime is 133312423. The reversal of 133312421 is 124213331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133312421 - 2⁶ = 133312357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133312393 and 133312402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133312423) 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 7 ways as a sum of consecutive naturals, for example, 75836 + ... + 77573.

It is an arithmetic number, because the mean of its divisors is an integer number (18409200).

Almost surely, 2^133312421 is an apocalyptic number.

133312421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133312421 is a deficient number, since it is larger than the sum of its proper divisors (13961179).

133312421 is a wasteful number, since it uses less digits than its factorization.

133312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153499.

The product of its digits is 432, while the sum is 20.

The square root of 133312421 is about 11546.0998176874. The cubic root of 133312421 is about 510.8462446687.

Adding to 133312421 its reverse (124213331), we get a palindrome (257525752).

The spelling of 133312421 in words is "one hundred thirty-three million, three hundred twelve thousand, four hundred twenty-one".