21222000011 has 4 divisors (see below), whose sum is σ = 22338947400. Its totient is φ = 20105052624.

The previous prime is 21221999999. The next prime is 21222000013. The reversal of 21222000011 is 11000022212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21222000011 - 2⁶ = 21221999947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21221999956 and 21222000001.

It is not an unprimeable number, because it can be changed into a prime (21222000013) 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 in 3 ways as a sum of consecutive naturals, for example, 558473666 + ... + 558473703.

It is an arithmetic number, because the mean of its divisors is an integer number (5584736850).

Almost surely, 2^21222000011 is an apocalyptic number.

21222000011 is a deficient number, since it is larger than the sum of its proper divisors (1116947389).

21222000011 is a wasteful number, since it uses less digits than its factorization.

21222000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116947388.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21222000011 its reverse (11000022212), we get a palindrome (32222022223).

The spelling of 21222000011 in words is "twenty-one billion, two hundred twenty-two million, eleven", and thus it is an aban number.