211213321111 has 4 divisors (see below), whose sum is σ = 227460499672. Its totient is φ = 194966142552.

The previous prime is 211213321063. The next prime is 211213321133. The reversal of 211213321111 is 111123312112.

211213321111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211213321111 - 2¹⁷ = 211213190039 is a prime.

It is a super-2 number, since 2×211213321111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211213327111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8123589261 + ... + 8123589286.

It is an arithmetic number, because the mean of its divisors is an integer number (56865124918).

Almost surely, 2^211213321111 is an apocalyptic number.

211213321111 is a deficient number, since it is larger than the sum of its proper divisors (16247178561).

211213321111 is a wasteful number, since it uses less digits than its factorization.

211213321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16247178560.

The product of its digits is 72, while the sum is 19.

Adding to 211213321111 its reverse (111123312112), we get a palindrome (322336633223).

The spelling of 211213321111 in words is "two hundred eleven billion, two hundred thirteen million, three hundred twenty-one thousand, one hundred eleven".