21223321111 has 8 divisors (see below), whose sum is σ = 21963286800. Its totient is φ = 20483897280.

The previous prime is 21223321109. The next prime is 21223321123. The reversal of 21223321111 is 11112332212.

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 21223321111 - 2¹ = 21223321109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223321411) 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, 54945 + ... + 213226.

It is an arithmetic number, because the mean of its divisors is an integer number (2745410850).

Almost surely, 2^21223321111 is an apocalyptic number.

21223321111 is a deficient number, since it is larger than the sum of its proper divisors (739965689).

21223321111 is a wasteful number, since it uses less digits than its factorization.

21223321111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270929.

The product of its digits is 144, while the sum is 19.

Adding to 21223321111 its reverse (11112332212), we get a palindrome (32335653323).

It can be divided in two parts, 2122 and 3321111, that added together give a palindrome (3323233).

The spelling of 21223321111 in words is "twenty-one billion, two hundred twenty-three million, three hundred twenty-one thousand, one hundred eleven".