22231303221 has 16 divisors (see below), whose sum is σ = 30756724544. Its totient is φ = 14271634944.

The previous prime is 22231303217. The next prime is 22231303231. The reversal of 22231303221 is 12230313222.

It is a happy number.

It is not a de Polignac number, because 22231303221 - 2² = 22231303217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231303231) 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, 1021615 + ... + 1043148.

It is an arithmetic number, because the mean of its divisors is an integer number (1922295284).

Almost surely, 2^22231303221 is an apocalyptic number.

It is an amenable number.

22231303221 is a deficient number, since it is larger than the sum of its proper divisors (8525421323).

22231303221 is a wasteful number, since it uses less digits than its factorization.

22231303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064900.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 22231303221 its reverse (12230313222), we get a palindrome (34461616443).

The spelling of 22231303221 in words is "twenty-two billion, two hundred thirty-one million, three hundred three thousand, two hundred twenty-one".