213012211 has 4 divisors (see below), whose sum is σ = 224223400. Its totient is φ = 201801024.

The previous prime is 213012209. The next prime is 213012259. The reversal of 213012211 is 112210312.

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 213012211 - 2¹ = 213012209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213012191 and 213012200.

It is not an unprimeable number, because it can be changed into a prime (213012281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5605566 + ... + 5605603.

It is an arithmetic number, because the mean of its divisors is an integer number (56055850).

Almost surely, 2^213012211 is an apocalyptic number.

213012211 is a deficient number, since it is larger than the sum of its proper divisors (11211189).

213012211 is a wasteful number, since it uses less digits than its factorization.

213012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211188.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 213012211 is about 14594.9378552976. The cubic root of 213012211 is about 597.2206741625.

Adding to 213012211 its reverse (112210312), we get a palindrome (325222523).

It can be divided in two parts, 2130 and 12211, that added together give a palindrome (14341).

The spelling of 213012211 in words is "two hundred thirteen million, twelve thousand, two hundred eleven".