22131231321 has 8 divisors (see below), whose sum is σ = 29548241440. Its totient is φ = 14734187712.

The previous prime is 22131231313. The next prime is 22131231341. The reversal of 22131231321 is 12313213122.

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

It is not a de Polignac number, because 22131231321 - 2³ = 22131231313 is a prime.

It is a super-2 number, since 2×22131231321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22131231341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4989040 + ... + 4993473.

It is an arithmetic number, because the mean of its divisors is an integer number (3693530180).

Almost surely, 2^22131231321 is an apocalyptic number.

It is an amenable number.

22131231321 is a deficient number, since it is larger than the sum of its proper divisors (7417010119).

22131231321 is an equidigital number, since it uses as much as digits as its factorization.

22131231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9983255.

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

Adding to 22131231321 its reverse (12313213122), we get a palindrome (34444444443).

The spelling of 22131231321 in words is "twenty-two billion, one hundred thirty-one million, two hundred thirty-one thousand, three hundred twenty-one".