221331311223 has 32 divisors (see below), whose sum is σ = 325302607872. Its totient is φ = 132744396000.

The previous prime is 221331311213. The next prime is 221331311261. The reversal of 221331311223 is 322113133122.

It is not a de Polignac number, because 221331311223 - 2¹⁷ = 221331180151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221331311193 and 221331311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331311213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1226086 + ... + 1394972.

It is an arithmetic number, because the mean of its divisors is an integer number (10165706496).

Almost surely, 2^221331311223 is an apocalyptic number.

221331311223 is a deficient number, since it is larger than the sum of its proper divisors (103971296649).

221331311223 is a wasteful number, since it uses less digits than its factorization.

221331311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169315.

The product of its digits is 1296, while the sum is 24.

Adding to 221331311223 its reverse (322113133122), we get a palindrome (543444444345).

The spelling of 221331311223 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred eleven thousand, two hundred twenty-three".