22013212321 has 4 divisors (see below), whose sum is σ = 22013509252. Its totient is φ = 22012915392.

The previous prime is 22013212289. The next prime is 22013212339. The reversal of 22013212321 is 12321231022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 774230625 + 21238981696 = 27825^2 + 145736^2 .

It is a cyclic number.

It is not a de Polignac number, because 22013212321 - 2⁵ = 22013212289 is a prime.

It is a super-3 number, since 3×22013212321³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22013212121) 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, 66205 + ... + 220021.

It is an arithmetic number, because the mean of its divisors is an integer number (5503377313).

Almost surely, 2^22013212321 is an apocalyptic number.

It is an amenable number.

22013212321 is a deficient number, since it is larger than the sum of its proper divisors (296931).

22013212321 is a wasteful number, since it uses less digits than its factorization.

22013212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296930.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22013212321 its reverse (12321231022), we get a palindrome (34334443343).

The spelling of 22013212321 in words is "twenty-two billion, thirteen million, two hundred twelve thousand, three hundred twenty-one".