21220320002 has 16 divisors (see below), whose sum is σ = 37223685312. Its totient is φ = 8882924400.

The previous prime is 21220320001. The next prime is 21220320049. The reversal of 21220320002 is 20002302212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21220320001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17624249 + ... + 17625452.

It is an arithmetic number, because the mean of its divisors is an integer number (2326480332).

Almost surely, 2^21220320002 is an apocalyptic number.

21220320002 is a deficient number, since it is larger than the sum of its proper divisors (16003365310).

21220320002 is a wasteful number, since it uses less digits than its factorization.

21220320002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35249753.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21220320002 its reverse (20002302212), we get a palindrome (41222622214).

The spelling of 21220320002 in words is "twenty-one billion, two hundred twenty million, three hundred twenty thousand, two".