211100213 has 4 divisors (see below), whose sum is σ = 211135980. Its totient is φ = 211064448.

The previous prime is 211100209. The next prime is 211100231. The reversal of 211100213 is 312001112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76702564 + 134397649 = 8758^2 + 11593^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100213 - 2² = 211100209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211100194 and 211100203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100293) 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, 6698 + ... + 21611.

It is an arithmetic number, because the mean of its divisors is an integer number (52783995).

Almost surely, 2^211100213 is an apocalyptic number.

It is an amenable number.

211100213 is a deficient number, since it is larger than the sum of its proper divisors (35767).

211100213 is an equidigital number, since it uses as much as digits as its factorization.

211100213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35766.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 211100213 is about 14529.2881105717. The cubic root of 211100213 is about 595.4284163561.

Adding to 211100213 its reverse (312001112), we get a palindrome (523101325).

The spelling of 211100213 in words is "two hundred eleven million, one hundred thousand, two hundred thirteen".