10211221210221 has 6 divisors (see below), whose sum is σ = 14749541748110. Its totient is φ = 6807480806808.

The previous prime is 10211221210193. The next prime is 10211221210241. The reversal of 10211221210221 is 12201212211201.

10211221210221 is a `hidden beast` number, since 1 + 0 + 2 + 11 + 221 + 210 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9979849628100 + 231371582121 = 3159090^2 + 481011^2 .

It is not a de Polignac number, because 10211221210221 - 2¹⁸ = 10211220948077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211221210194 and 10211221210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211221210241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 567290067226 + ... + 567290067243.

Almost surely, 2^{10211221210221} is an apocalyptic number.

It is an amenable number.

10211221210221 is a deficient number, since it is larger than the sum of its proper divisors (4538320537889).

10211221210221 is a wasteful number, since it uses less digits than its factorization.

10211221210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134580134475 (or 1134580134472 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 10211221210221 its reverse (12201212211201), we get a palindrome (22412433421422).

The spelling of 10211221210221 in words is "ten trillion, two hundred eleven billion, two hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".