21222000022 has 4 divisors (see below), whose sum is σ = 31833000036. Its totient is φ = 10611000010.

The previous prime is 21222000013. The next prime is 21222000029. The reversal of 21222000022 is 22000022212.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 21221999966 and 21222000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222000029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305500004 + ... + 5305500007.

It is an arithmetic number, because the mean of its divisors is an integer number (7958250009).

Almost surely, 2^21222000022 is an apocalyptic number.

21222000022 is a deficient number, since it is larger than the sum of its proper divisors (10611000014).

21222000022 is a wasteful number, since it uses less digits than its factorization.

21222000022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10611000013.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 21222000022 its reverse (22000022212), we get a palindrome (43222022234).

It can be divided in two parts, 212 and 22000022, that multiplied together give a palindrome (4664004664).

The spelling of 21222000022 in words is "twenty-one billion, two hundred twenty-two million, twenty-two", and thus it is an aban number.