211105213 has 4 divisors (see below), whose sum is σ = 230296608. Its totient is φ = 191913820.

The previous prime is 211105207. The next prime is 211105229. The reversal of 211105213 is 312501112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211105213 - 2¹³ = 211097021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211105273) 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, 9595681 + ... + 9595702.

It is an arithmetic number, because the mean of its divisors is an integer number (57574152).

Almost surely, 2^211105213 is an apocalyptic number.

It is an amenable number.

211105213 is a deficient number, since it is larger than the sum of its proper divisors (19191395).

211105213 is a wasteful number, since it uses less digits than its factorization.

211105213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19191394.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 211105213 is about 14529.4601757946. The cubic root of 211105213 is about 595.4331173124.

Adding to 211105213 its reverse (312501112), we get a palindrome (523606325).

The spelling of 211105213 in words is "two hundred eleven million, one hundred five thousand, two hundred thirteen".