21222030000 has 200 divisors, whose sum is σ = 68723601408. Its totient is φ = 5641376000.

The previous prime is 21222029977. The next prime is 21222030017. The reversal of 21222030000 is 3022212.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11489077 + ... + 11490923.

Almost surely, 2^21222030000 is an apocalyptic number.

21222030000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34361800704).

21222030000 is an abundant number, since it is smaller than the sum of its proper divisors (47501571408).

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

21222030000 is a wasteful number, since it uses less digits than its factorization.

21222030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261 (or 2240 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21222030000 its reverse (3022212), we get a palindrome (21225052212).

The spelling of 21222030000 in words is "twenty-one billion, two hundred twenty-two million, thirty thousand".