211112213 has 8 divisors (see below), whose sum is σ = 228330648. Its totient is φ = 194033664.

The previous prime is 211112191. The next prime is 211112219. The reversal of 211112213 is 312211112.

It can be written as a sum of positive squares in 4 ways, for example, as 36264484 + 174847729 = 6022^2 + 13223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211112213 - 2¹⁰ = 211111189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112219) 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, 31820 + ... + 37877.

It is an arithmetic number, because the mean of its divisors is an integer number (28541331).

Almost surely, 2^211112213 is an apocalyptic number.

It is an amenable number.

211112213 is a deficient number, since it is larger than the sum of its proper divisors (17218435).

211112213 is a wasteful number, since it uses less digits than its factorization.

211112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69943.

The product of its digits is 24, while the sum is 14.

The square root of 211112213 is about 14529.7010636833. The cubic root of 211112213 is about 595.4396985264.

Adding to 211112213 its reverse (312211112), we get a palindrome (523323325).

The spelling of 211112213 in words is "two hundred eleven million, one hundred twelve thousand, two hundred thirteen".