21222365311 has 8 divisors (see below), whose sum is σ = 24711757344. Its totient is φ = 17847379680.

The previous prime is 21222365251. The next prime is 21222365321. The reversal of 21222365311 is 11356322212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222365311 - 2¹³ = 21222357119 is a prime.

It is a super-2 number, since 2×21222365311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222365311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222365321) 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, 28601200 + ... + 28601941.

It is an arithmetic number, because the mean of its divisors is an integer number (3088969668).

Almost surely, 2^21222365311 is an apocalyptic number.

21222365311 is a deficient number, since it is larger than the sum of its proper divisors (3489392033).

21222365311 is an equidigital number, since it uses as much as digits as its factorization.

21222365311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57203201.

The product of its digits is 4320, while the sum is 28.

Adding to 21222365311 its reverse (11356322212), we get a palindrome (32578687523).

The spelling of 21222365311 in words is "twenty-one billion, two hundred twenty-two million, three hundred sixty-five thousand, three hundred eleven".