210022112221 has 12 divisors (see below), whose sum is σ = 212085440532. Its totient is φ = 207978655104.

The previous prime is 210022112191. The next prime is 210022112231. The reversal of 210022112221 is 122211220012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 10896436996 + 199125675225 = 104386^2 + 446235^2 .

It is not a de Polignac number, because 210022112221 - 2³⁵ = 175662373853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210022112195 and 210022112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210022112231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27714585 + ... + 27722161.

It is an arithmetic number, because the mean of its divisors is an integer number (17673786711).

Almost surely, 2^210022112221 is an apocalyptic number.

It is an amenable number.

210022112221 is a deficient number, since it is larger than the sum of its proper divisors (2063328311).

210022112221 is an equidigital number, since it uses as much as digits as its factorization.

210022112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10128 (or 10019 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210022112221 its reverse (122211220012), we get a palindrome (332233332233).

The spelling of 210022112221 in words is "two hundred ten billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".