21222113022 has 32 divisors (see below), whose sum is σ = 51447548160. Its totient is φ = 6430943160.

The previous prime is 21222112999. The next prime is 21222113027. The reversal of 21222113022 is 22031122212.

It is a super-2 number, since 2×21222113022² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21222112986 and 21222113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222113027) 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, 17863138 + ... + 17864325.

It is an arithmetic number, because the mean of its divisors is an integer number (1607735880).

Almost surely, 2^21222113022 is an apocalyptic number.

21222113022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222113022 is an abundant number, since it is smaller than the sum of its proper divisors (30225435138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222113022 is a wasteful number, since it uses less digits than its factorization.

21222113022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35727485 (or 35727479 counting only the distinct ones).

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

Adding to 21222113022 its reverse (22031122212), we get a palindrome (43253235234).

The spelling of 21222113022 in words is "twenty-one billion, two hundred twenty-two million, one hundred thirteen thousand, twenty-two".