21210202112222 has 8 divisors (see below), whose sum is σ = 31880100121272. Its totient is φ = 10583502071800.

The previous prime is 21210202112189. The next prime is 21210202112237. The reversal of 21210202112222 is 22221120201212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21210202112194 and 21210202112203.

It is a congruent number.

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, 10799490929 + ... + 10799492892.

It is an arithmetic number, because the mean of its divisors is an integer number (3985012515159).

Almost surely, 2^{21210202112222} is an apocalyptic number.

21210202112222 is a deficient number, since it is larger than the sum of its proper divisors (10669898009050).

21210202112222 is a wasteful number, since it uses less digits than its factorization.

21210202112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21598984314.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21210202112222 its reverse (22221120201212), we get a palindrome (43431322313434).

The spelling of 21210202112222 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, one hundred twelve thousand, two hundred twenty-two".