21224421002 has 8 divisors (see below), whose sum is σ = 32863619712. Its totient is φ = 10269881100.

The previous prime is 21224420951. The next prime is 21224421059. The reversal of 21224421002 is 20012442212.

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

It is an unprimeable number.

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, 171164624 + ... + 171164747.

It is an arithmetic number, because the mean of its divisors is an integer number (4107952464).

Almost surely, 2^21224421002 is an apocalyptic number.

21224421002 is a deficient number, since it is larger than the sum of its proper divisors (11639198710).

21224421002 is a wasteful number, since it uses less digits than its factorization.

21224421002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342329404.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21224421002 its reverse (20012442212), we get a palindrome (41236863214).

The spelling of 21224421002 in words is "twenty-one billion, two hundred twenty-four million, four hundred twenty-one thousand, two".