211213311223 has 4 divisors (see below), whose sum is σ = 211353096528. Its totient is φ = 211073525920.

The previous prime is 211213311217. The next prime is 211213311247. The reversal of 211213311223 is 322113312112.

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 211213311223 - 2¹⁷ = 211213180151 is a prime.

It is a super-2 number, since 2×211213311223² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211213311194 and 211213311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211213311923) 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, 69890386 + ... + 69893407.

It is an arithmetic number, because the mean of its divisors is an integer number (52838274132).

Almost surely, 2^211213311223 is an apocalyptic number.

211213311223 is a deficient number, since it is larger than the sum of its proper divisors (139785305).

211213311223 is a wasteful number, since it uses less digits than its factorization.

211213311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139785304.

The product of its digits is 432, while the sum is 22.

Adding to 211213311223 its reverse (322113312112), we get a palindrome (533326623335).

The spelling of 211213311223 in words is "two hundred eleven billion, two hundred thirteen million, three hundred eleven thousand, two hundred twenty-three".