133105121 has 8 divisors (see below), whose sum is σ = 143324640. Its totient is φ = 123151168.

The previous prime is 133105097. The next prime is 133105129. The reversal of 133105121 is 121501331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133105121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133105121.

It is not an unprimeable number, because it can be changed into a prime (133105129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65351 + ... + 67356.

It is an arithmetic number, because the mean of its divisors is an integer number (17915580).

Almost surely, 2^133105121 is an apocalyptic number.

It is an amenable number.

133105121 is a deficient number, since it is larger than the sum of its proper divisors (10219519).

133105121 is a wasteful number, since it uses less digits than its factorization.

133105121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132783.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 133105121 is about 11537.1192678242. The cubic root of 133105121 is about 510.5813197061.

Adding to 133105121 its reverse (121501331), we get a palindrome (254606452).

The spelling of 133105121 in words is "one hundred thirty-three million, one hundred five thousand, one hundred twenty-one".