133121234 has 4 divisors (see below), whose sum is σ = 199681854. Its totient is φ = 66560616.

The previous prime is 133121189. The next prime is 133121257. The reversal of 133121234 is 432121331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432121331 = 269 ⋅1606399.

It can be written as a sum of positive squares in only one way, i.e., 127622209 + 5499025 = 11297^2 + 2345^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33280307 + ... + 33280310.

Almost surely, 2^133121234 is an apocalyptic number.

133121234 is a deficient number, since it is larger than the sum of its proper divisors (66560620).

133121234 is an equidigital number, since it uses as much as digits as its factorization.

133121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66560619.

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

The square root of 133121234 is about 11537.8175579266. The cubic root of 133121234 is about 510.6019216303.

Adding to 133121234 its reverse (432121331), we get a palindrome (565242565).

The spelling of 133121234 in words is "one hundred thirty-three million, one hundred twenty-one thousand, two hundred thirty-four".