211320013211 has 4 divisors (see below), whose sum is σ = 211482443424. Its totient is φ = 211157583000.

The previous prime is 211320013181. The next prime is 211320013217. The reversal of 211320013211 is 112310023112.

211320013211 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 211320013211 - 2⁶ = 211320013147 is a prime.

It is a super-2 number, since 2×211320013211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211320013211.

It is not an unprimeable number, because it can be changed into a prime (211320013217) 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, 81213155 + ... + 81215756.

It is an arithmetic number, because the mean of its divisors is an integer number (52870610856).

Almost surely, 2^211320013211 is an apocalyptic number.

211320013211 is a deficient number, since it is larger than the sum of its proper divisors (162430213).

211320013211 is a wasteful number, since it uses less digits than its factorization.

211320013211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162430212.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211320013211 its reverse (112310023112), we get a palindrome (323630036323).

Subtracting from 211320013211 its reverse (112310023112), we obtain a palindrome (99009990099).

The spelling of 211320013211 in words is "two hundred eleven billion, three hundred twenty million, thirteen thousand, two hundred eleven".