133211131 has 4 divisors (see below), whose sum is σ = 133269192. Its totient is φ = 133153072.

The previous prime is 133211093. The next prime is 133211153. The reversal of 133211131 is 131112331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133211131 - 2⁷ = 133211003 is a prime.

It is a super-2 number, since 2×133211131² = 35490410844598322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133211161) 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, 25441 + ... + 30226.

It is an arithmetic number, because the mean of its divisors is an integer number (33317298).

Almost surely, 2^133211131 is an apocalyptic number.

133211131 is a deficient number, since it is larger than the sum of its proper divisors (58061).

133211131 is an equidigital number, since it uses as much as digits as its factorization.

133211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58060.

The product of its digits is 54, while the sum is 16.

The square root of 133211131 is about 11541.7126545414. The cubic root of 133211131 is about 510.7168325552.

Adding to 133211131 its reverse (131112331), we get a palindrome (264323462).

It can be divided in two parts, 13321 and 1131, that multiplied together give a palindrome (15066051).

The spelling of 133211131 in words is "one hundred thirty-three million, two hundred eleven thousand, one hundred thirty-one".