21420230222 has 16 divisors (see below), whose sum is σ = 33838421760. Its totient is φ = 10141323192.

The previous prime is 21420230189. The next prime is 21420230263. The reversal of 21420230222 is 22203202412.

It is a junction number, because it is equal to n+sod(n) for n = 21420230194 and 21420230203.

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, 64598 + ... + 216825.

It is an arithmetic number, because the mean of its divisors is an integer number (2114901360).

Almost surely, 2^21420230222 is an apocalyptic number.

21420230222 is a deficient number, since it is larger than the sum of its proper divisors (12418191538).

21420230222 is a wasteful number, since it uses less digits than its factorization.

21420230222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283447.

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

Adding to 21420230222 its reverse (22203202412), we get a palindrome (43623432634).

The spelling of 21420230222 in words is "twenty-one billion, four hundred twenty million, two hundred thirty thousand, two hundred twenty-two".