22011222231 has 8 divisors (see below), whose sum is σ = 32609218160. Its totient is φ = 14674148136.

The previous prime is 22011222229. The next prime is 22011222253. The reversal of 22011222231 is 13222211022.

It is not a de Polignac number, because 22011222231 - 2¹ = 22011222229 is a prime.

It is a super-2 number, since 2×22011222231² (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 (22011222131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407615200 + ... + 407615253.

It is an arithmetic number, because the mean of its divisors is an integer number (4076152270).

Almost surely, 2^22011222231 is an apocalyptic number.

22011222231 is a deficient number, since it is larger than the sum of its proper divisors (10597995929).

22011222231 is an equidigital number, since it uses as much as digits as its factorization.

22011222231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815230462 (or 815230456 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22011222231 its reverse (13222211022), we get a palindrome (35233433253).

The spelling of 22011222231 in words is "twenty-two billion, eleven million, two hundred twenty-two thousand, two hundred thirty-one".