133211213 has 4 divisors (see below), whose sum is σ = 133682208. Its totient is φ = 132740220.

The previous prime is 133211179. The next prime is 133211219. The reversal of 133211213 is 312112331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133211213 - 2¹⁴ = 133194829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133211191 and 133211200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133211219) 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, 235073 + ... + 235638.

It is an arithmetic number, because the mean of its divisors is an integer number (33420552).

Almost surely, 2^133211213 is an apocalyptic number.

It is an amenable number.

133211213 is a deficient number, since it is larger than the sum of its proper divisors (470995).

133211213 is an equidigital number, since it uses as much as digits as its factorization.

133211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470994.

The product of its digits is 108, while the sum is 17.

The square root of 133211213 is about 11541.7162068732. The cubic root of 133211213 is about 510.7169373482.

Adding to 133211213 its reverse (312112331), we get a palindrome (445323544).

The spelling of 133211213 in words is "one hundred thirty-three million, two hundred eleven thousand, two hundred thirteen".