213221112 has 32 divisors (see below), whose sum is σ = 574057680. Its totient is φ = 65606400.

The previous prime is 213221087. The next prime is 213221117. The reversal of 213221112 is 211122312.

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

It is a junction number, because it is equal to n+sod(n) for n = 213221091 and 213221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221117) 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, 341389 + ... + 342012.

Almost surely, 2^213221112 is an apocalyptic number.

It is an amenable number.

213221112 is an abundant number, since it is smaller than the sum of its proper divisors (360836568).

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

213221112 is a wasteful number, since it uses less digits than its factorization.

213221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683423 (or 683419 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 213221112 is about 14602.0927267293. The cubic root of 213221112 is about 597.4158417441.

Adding to 213221112 its reverse (211122312), we get a palindrome (424343424).

The spelling of 213221112 in words is "two hundred thirteen million, two hundred twenty-one thousand, one hundred twelve".