22131312321 has 8 divisors (see below), whose sum is σ = 29587528960. Its totient is φ = 14714651952.

The previous prime is 22131312239. The next prime is 22131312337. The reversal of 22131312321 is 12321313122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22131312321 - 2⁷ = 22131312193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131312121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9887761 + ... + 9889998.

It is an arithmetic number, because the mean of its divisors is an integer number (3698441120).

Almost surely, 2^22131312321 is an apocalyptic number.

It is an amenable number.

22131312321 is a deficient number, since it is larger than the sum of its proper divisors (7456216639).

22131312321 is a wasteful number, since it uses less digits than its factorization.

22131312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19778135.

The product of its digits is 432, while the sum is 21.

Adding to 22131312321 its reverse (12321313122), we get a palindrome (34452625443).

The spelling of 22131312321 in words is "twenty-two billion, one hundred thirty-one million, three hundred twelve thousand, three hundred twenty-one".