133112161 has 16 divisors (see below), whose sum is σ = 164102400. Its totient is φ = 105144768.

The previous prime is 133112143. The next prime is 133112191. The reversal of 133112161 is 161211331.

It is a cyclic number.

It is not a de Polignac number, because 133112161 - 2¹³ = 133103969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133112101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100260 + ... + 101578.

It is an arithmetic number, because the mean of its divisors is an integer number (10256400).

Almost surely, 2^133112161 is an apocalyptic number.

It is an amenable number.

133112161 is a deficient number, since it is larger than the sum of its proper divisors (30990239).

133112161 is a wasteful number, since it uses less digits than its factorization.

133112161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its digits is 108, while the sum is 19.

The square root of 133112161 is about 11537.4243659493. The cubic root of 133112161 is about 510.5903211858.

Adding to 133112161 its reverse (161211331), we get a palindrome (294323492).

The spelling of 133112161 in words is "one hundred thirty-three million, one hundred twelve thousand, one hundred sixty-one".