133403121 has 12 divisors (see below), whose sum is σ = 193169860. Its totient is φ = 88715520.

The previous prime is 133403117. The next prime is 133403129. The reversal of 133403121 is 121304331.

133403121 is a `hidden beast` number, since 13 + 340 + 312 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52403121 + 81000000 = 7239^2 + 9000^2 .

It is not a de Polignac number, because 133403121 - 2² = 133403117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133403094 and 133403103.

It is not an unprimeable number, because it can be changed into a prime (133403129) 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 11 ways as a sum of consecutive naturals, for example, 14440 + ... + 21801.

Almost surely, 2^133403121 is an apocalyptic number.

It is an amenable number.

133403121 is a deficient number, since it is larger than the sum of its proper divisors (59766739).

133403121 is a wasteful number, since it uses less digits than its factorization.

133403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36656 (or 36653 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 133403121 is about 11550.0268830856. The cubic root of 133403121 is about 510.9620709616.

Adding to 133403121 its reverse (121304331), we get a palindrome (254707452).

It can be divided in two parts, 13340 and 3121, that added together give a palindrome (16461).

The spelling of 133403121 in words is "one hundred thirty-three million, four hundred three thousand, one hundred twenty-one".