213213221112 has 32 divisors (see below), whose sum is σ = 533058112080. Its totient is φ = 71067732480.

The previous prime is 213213221059. The next prime is 213213221113. The reversal of 213213221112 is 211122312312.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213213221113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341958 + ... + 737130.

Almost surely, 2^213213221112 is an apocalyptic number.

It is an amenable number.

213213221112 is an abundant number, since it is smaller than the sum of its proper divisors (319844890968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213213221112 is a wasteful number, since it uses less digits than its factorization.

213213221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417663 (or 417659 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

Adding to 213213221112 its reverse (211122312312), we get a palindrome (424335533424).

The spelling of 213213221112 in words is "two hundred thirteen billion, two hundred thirteen million, two hundred twenty-one thousand, one hundred twelve".