99211 has 4 divisors (see below), whose sum is σ = 113392. Its totient is φ = 85032.

The previous prime is 99191. The next prime is 99223. The reversal of 99211 is 11299.

99211 is nontrivially palindromic in base 15.

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 99211 - 2⁷ = 99083 is a prime.

It is a Duffinian number.

99211 is a lucky number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99241) 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, 7080 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (28348).

2⁹⁹²¹¹ is an apocalyptic number.

99211 is a deficient number, since it is larger than the sum of its proper divisors (14181).

99211 is a wasteful number, since it uses less digits than its factorization.

99211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14180.

The product of its digits is 162, while the sum is 22.

The square root of 99211 is about 314.9777769939. The cubic root of 99211 is about 46.2934920810.

The spelling of 99211 in words is "ninety-nine thousand, two hundred eleven".