2133212231 has 4 divisors (see below), whose sum is σ = 2137155864. Its totient is φ = 2129268600.

The previous prime is 2133212197. The next prime is 2133212261. The reversal of 2133212231 is 1322123312.

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 2133212231 - 2¹⁰ = 2133211207 is a prime.

It is a super-2 number, since 2×2133212231² = 9101188844975994722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133212261) 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, 1971005 + ... + 1972086.

It is an arithmetic number, because the mean of its divisors is an integer number (534288966).

Almost surely, 2^2133212231 is an apocalyptic number.

2133212231 is a deficient number, since it is larger than the sum of its proper divisors (3943633).

2133212231 is an equidigital number, since it uses as much as digits as its factorization.

2133212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943632.

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

The square root of 2133212231 is about 46186.7105453506. The cubic root of 2133212231 is about 1287.2948200513.

Adding to 2133212231 its reverse (1322123312), we get a palindrome (3455335543).

The spelling of 2133212231 in words is "two billion, one hundred thirty-three million, two hundred twelve thousand, two hundred thirty-one".