21223321111231 has 16 divisors (see below), whose sum is σ = 21281835294720. Its totient is φ = 21164894051040.

The previous prime is 21223321111163. The next prime is 21223321111247. The reversal of 21223321111231 is 13211112332212.

It is a cyclic number.

It is not a de Polignac number, because 21223321111231 - 2¹¹ = 21223321109183 is a prime.

It is a super-2 number, since 2×21223321111231² (a number of 27 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 = 21223321111196 and 21223321111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223321111631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4512717426 + ... + 4512722128.

It is an arithmetic number, because the mean of its divisors is an integer number (1330114705920).

Almost surely, 2^{21223321111231} is an apocalyptic number.

21223321111231 is a deficient number, since it is larger than the sum of its proper divisors (58514183489).

21223321111231 is a wasteful number, since it uses less digits than its factorization.

21223321111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11526.

The product of its digits is 864, while the sum is 25.

Adding to 21223321111231 its reverse (13211112332212), we get a palindrome (34434433443443).

The spelling of 21223321111231 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred twenty-one million, one hundred eleven thousand, two hundred thirty-one".