10222122212221 has 4 divisors (see below), whose sum is σ = 10222577908092. Its totient is φ = 10221666516352.

The previous prime is 10222122212177. The next prime is 10222122212249. The reversal of 10222122212221 is 12221222122201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7978534636900 + 2243587575321 = 2824630^2 + 1497861^2 .

It is a cyclic number.

It is not a de Polignac number, because 10222122212221 - 2²⁹ = 10221585341309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10222122212192 and 10222122212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10222122212021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227814286 + ... + 227859151.

It is an arithmetic number, because the mean of its divisors is an integer number (2555644477023).

Almost surely, 2^{10222122212221} is an apocalyptic number.

It is an amenable number.

10222122212221 is a deficient number, since it is larger than the sum of its proper divisors (455695871).

10222122212221 is an equidigital number, since it uses as much as digits as its factorization.

10222122212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455695870.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 10222122212221 its reverse (12221222122201), we get a palindrome (22443344334422).

The spelling of 10222122212221 in words is "ten trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".