213133212231 has 4 divisors (see below), whose sum is σ = 284177616312. Its totient is φ = 142088808152.

The previous prime is 213133212221. The next prime is 213133212251. The reversal of 213133212231 is 132212331312.

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 213133212231 - 2¹¹ = 213133210183 is a prime.

It is a super-2 number, since 2×213133212231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213133212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35522202036 + ... + 35522202041.

It is an arithmetic number, because the mean of its divisors is an integer number (71044404078).

Almost surely, 2^213133212231 is an apocalyptic number.

213133212231 is a deficient number, since it is larger than the sum of its proper divisors (71044404081).

213133212231 is an equidigital number, since it uses as much as digits as its factorization.

213133212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71044404080.

The product of its digits is 1296, while the sum is 24.

Adding to 213133212231 its reverse (132212331312), we get a palindrome (345345543543).

The spelling of 213133212231 in words is "two hundred thirteen billion, one hundred thirty-three million, two hundred twelve thousand, two hundred thirty-one".