133121612 has 12 divisors (see below), whose sum is σ = 250883136. Its totient is φ = 61440720.

The previous prime is 133121579. The next prime is 133121617. The reversal of 133121612 is 216121331.

It is not an unprimeable number, because it can be changed into a prime (133121617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279964 + ... + 1280067.

It is an arithmetic number, because the mean of its divisors is an integer number (20906928).

Almost surely, 2^133121612 is an apocalyptic number.

It is an amenable number.

133121612 is a deficient number, since it is larger than the sum of its proper divisors (117761524).

133121612 is a wasteful number, since it uses less digits than its factorization.

133121612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560048 (or 2560046 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 133121612 is about 11537.8339388292. The cubic root of 133121612 is about 510.6024049175.

Adding to 133121612 its reverse (216121331), we get a palindrome (349242943).

The spelling of 133121612 in words is "one hundred thirty-three million, one hundred twenty-one thousand, six hundred twelve".