21220000006 has 8 divisors (see below), whose sum is σ = 32305074840. Its totient is φ = 10451641728.

The previous prime is 21220000001. The next prime is 21220000019. The reversal of 21220000006 is 60000002212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220000001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79178971 + ... + 79179238.

It is an arithmetic number, because the mean of its divisors is an integer number (4038134355).

Almost surely, 2^21220000006 is an apocalyptic number.

21220000006 is a deficient number, since it is larger than the sum of its proper divisors (11085074834).

21220000006 is a wasteful number, since it uses less digits than its factorization.

21220000006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158358278.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21220000006 its reverse (60000002212), we get a palindrome (81220002218).

The spelling of 21220000006 in words is "twenty-one billion, two hundred twenty million, six", and thus it is an aban number.