133121211 has 8 divisors (see below), whose sum is σ = 178558464. Its totient is φ = 88215720.

The previous prime is 133121189. The next prime is 133121257. The reversal of 133121211 is 112121331.

It is a happy number.

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

It is not a de Polignac number, because 133121211 - 2⁵ = 133121179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133121291) 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, 132355 + ... + 133356.

It is an arithmetic number, because the mean of its divisors is an integer number (22319808).

Almost surely, 2^133121211 is an apocalyptic number.

133121211 is a deficient number, since it is larger than the sum of its proper divisors (45437253).

133121211 is a wasteful number, since it uses less digits than its factorization.

133121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265881.

The product of its digits is 36, while the sum is 15.

The square root of 133121211 is about 11537.8165612043. The cubic root of 133121211 is about 510.6018922240.

Adding to 133121211 its reverse (112121331), we get a palindrome (245242542).

The spelling of 133121211 in words is "one hundred thirty-three million, one hundred twenty-one thousand, two hundred eleven".