211345321 has 16 divisors (see below), whose sum is σ = 248352768. Its totient is φ = 177843600.

The previous prime is 211345319. The next prime is 211345327. The reversal of 211345321 is 123543112.

It is a happy number.

It is not a de Polignac number, because 211345321 - 2¹ = 211345319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211345292 and 211345301.

It is not an unprimeable number, because it can be changed into a prime (211345327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5631 + ... + 21316.

It is an arithmetic number, because the mean of its divisors is an integer number (15522048).

Almost surely, 2^211345321 is an apocalyptic number.

It is an amenable number.

211345321 is a deficient number, since it is larger than the sum of its proper divisors (37007447).

211345321 is a wasteful number, since it uses less digits than its factorization.

211345321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27012.

The product of its digits is 720, while the sum is 22.

The square root of 211345321 is about 14537.7206260129. The cubic root of 211345321 is about 595.6587774367.

Adding to 211345321 its reverse (123543112), we get a palindrome (334888433).

The spelling of 211345321 in words is "two hundred eleven million, three hundred forty-five thousand, three hundred twenty-one".