2231222221321 has 4 divisors (see below), whose sum is σ = 2231234230932. Its totient is φ = 2231210211712.

The previous prime is 2231222221279. The next prime is 2231222221357. The reversal of 2231222221321 is 1231222221322.

2231222221321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1316021952400 + 915200268921 = 1147180^2 + 956661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231222221321 - 2¹¹ = 2231222219273 is a prime.

It is a super-3 number, since 3×2231222221321³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231222221021) 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, 5721676 + ... + 6099181.

It is an arithmetic number, because the mean of its divisors is an integer number (557808557733).

Almost surely, 2^{2231222221321} is an apocalyptic number.

It is an amenable number.

2231222221321 is a deficient number, since it is larger than the sum of its proper divisors (12009611).

2231222221321 is a wasteful number, since it uses less digits than its factorization.

2231222221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12009610.

The product of its digits is 2304, while the sum is 25.

Adding to 2231222221321 its reverse (1231222221322), we get a palindrome (3462444442643).

Subtracting from 2231222221321 its reverse (1231222221322), we obtain a palindrome (999999999999).

The spelling of 2231222221321 in words is "two trillion, two hundred thirty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, three hundred twenty-one".