221211211223 has 8 divisors (see below), whose sum is σ = 224523960192. Its totient is φ = 217898788536.

The previous prime is 221211211129. The next prime is 221211211321. The reversal of 221211211223 is 322112112122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221211211223 - 2¹² = 221211207127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221211211195 and 221211211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211201223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1517336 + ... + 1656722.

It is an arithmetic number, because the mean of its divisors is an integer number (28065495024).

Almost surely, 2^221211211223 is an apocalyptic number.

221211211223 is a deficient number, since it is larger than the sum of its proper divisors (3312748969).

221211211223 is a wasteful number, since it uses less digits than its factorization.

221211211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163141.

The product of its digits is 192, while the sum is 20.

Adding to 221211211223 its reverse (322112112122), we get a palindrome (543323323345).

The spelling of 221211211223 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-three".