22313231221 has 24 divisors (see below), whose sum is σ = 24004257984. Its totient is φ = 20668354560.

The previous prime is 22313231203. The next prime is 22313231249. The reversal of 22313231221 is 12213231322.

It is not a de Polignac number, because 22313231221 - 2¹¹ = 22313229173 is a prime.

It is a super-3 number, since 3×22313231221³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22313231192 and 22313231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22313231251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105749806 + ... + 105750016.

It is an arithmetic number, because the mean of its divisors is an integer number (1000177416).

Almost surely, 2^22313231221 is an apocalyptic number.

It is an amenable number.

22313231221 is a deficient number, since it is larger than the sum of its proper divisors (1691026763).

22313231221 is a wasteful number, since it uses less digits than its factorization.

22313231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 588 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 22313231221 its reverse (12213231322), we get a palindrome (34526462543).

The spelling of 22313231221 in words is "twenty-two billion, three hundred thirteen million, two hundred thirty-one thousand, two hundred twenty-one".