21222000443 has 8 divisors (see below), whose sum is σ = 24560724480. Its totient is φ = 17960028840.

The previous prime is 21222000407. The next prime is 21222000463. The reversal of 21222000443 is 34400022212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222000443 - 2¹⁶ = 21221934907 is a prime.

It is a super-4 number, since 4×21222000443⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222000463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19187513 + ... + 19188618.

It is an arithmetic number, because the mean of its divisors is an integer number (3070090560).

Almost surely, 2^21222000443 is an apocalyptic number.

21222000443 is a deficient number, since it is larger than the sum of its proper divisors (3338724037).

21222000443 is an equidigital number, since it uses as much as digits as its factorization.

21222000443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38376217.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21222000443 its reverse (34400022212), we get a palindrome (55622022655).

The spelling of 21222000443 in words is "twenty-one billion, two hundred twenty-two million, four hundred forty-three", and thus it is an aban number.