213211210331 has 12 divisors (see below), whose sum is σ = 257169678192. Its totient is φ = 173133913104.

The previous prime is 213211210327. The next prime is 213211210361. The reversal of 213211210331 is 133012112312.

It is a happy number.

It is not a de Polignac number, because 213211210331 - 2² = 213211210327 is a prime.

It is a super-2 number, since 2×213211210331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213211210301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42184100 + ... + 42189153.

It is an arithmetic number, because the mean of its divisors is an integer number (21430806516).

Almost surely, 2^213211210331 is an apocalyptic number.

213211210331 is a deficient number, since it is larger than the sum of its proper divisors (43958467861).

213211210331 is an equidigital number, since it uses as much as digits as its factorization.

213211210331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84373298 (or 84373279 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213211210331 its reverse (133012112312), we get a palindrome (346223322643).

The spelling of 213211210331 in words is "two hundred thirteen billion, two hundred eleven million, two hundred ten thousand, three hundred thirty-one".