10212222222221 has 8 divisors (see below), whose sum is σ = 10216495182744. Its totient is φ = 10207949554240.

The previous prime is 10212222222217. The next prime is 10212222222239. The reversal of 10212222222221 is 12222222221201.

It can be written as a sum of positive squares in 4 ways, for example, as 416010810121 + 9796211412100 = 644989^2 + 3129890^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 10212222222221 - 2² = 10212222222217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212222222421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95070275 + ... + 95177631.

It is an arithmetic number, because the mean of its divisors is an integer number (1277061897843).

Almost surely, 2^{10212222222221} is an apocalyptic number.

It is an amenable number.

10212222222221 is a deficient number, since it is larger than the sum of its proper divisors (4272960523).

10212222222221 is a wasteful number, since it uses less digits than its factorization.

10212222222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146271.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 10212222222221 its reverse (12222222221201), we get a palindrome (22434444443422).

The spelling of 10212222222221 in words is "ten trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".