21002320222 has 16 divisors (see below), whose sum is σ = 34433198352. Its totient is φ = 9548700480.

The previous prime is 21002320153. The next prime is 21002320243. The reversal of 21002320222 is 22202320012.

It is a junction number, because it is equal to n+sod(n) for n = 21002320196 and 21002320205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6026479 + ... + 6029962.

It is an arithmetic number, because the mean of its divisors is an integer number (2152074897).

Almost surely, 2^21002320222 is an apocalyptic number.

21002320222 is a deficient number, since it is larger than the sum of its proper divisors (13430878130).

21002320222 is a wasteful number, since it uses less digits than its factorization.

21002320222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12056523.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21002320222 its reverse (22202320012), we get a palindrome (43204640234).

The spelling of 21002320222 in words is "twenty-one billion, two million, three hundred twenty thousand, two hundred twenty-two".