22011312231 has 6 divisors (see below), whose sum is σ = 31794117680. Its totient is φ = 14674208148.

The previous prime is 22011312227. The next prime is 22011312233. The reversal of 22011312231 is 13221311022.

It is not a de Polignac number, because 22011312231 - 2² = 22011312227 is a prime.

It is a super-2 number, since 2×22011312231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011312233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222850671 + ... + 1222850688.

Almost surely, 2^22011312231 is an apocalyptic number.

22011312231 is a deficient number, since it is larger than the sum of its proper divisors (9782805449).

22011312231 is a wasteful number, since it uses less digits than its factorization.

22011312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445701365 (or 2445701362 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 22011312231 its reverse (13221311022), we get a palindrome (35232623253).

The spelling of 22011312231 in words is "twenty-two billion, eleven million, three hundred twelve thousand, two hundred thirty-one".