10021110221 has 2 divisors, whose sum is σ = 10021110222. Its totient is φ = 10021110220.

The previous prime is 10021110193. The next prime is 10021110287. The reversal of 10021110221 is 12201112001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9628515625 + 392594596 = 98125^2 + 19814^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021110221 - 2¹⁴ = 10021093837 is a prime.

It is a super-2 number, since 2×10021110221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021119221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010555110 + 5010555111.

It is an arithmetic number, because the mean of its divisors is an integer number (5010555111).

Almost surely, 2^10021110221 is an apocalyptic number.

It is an amenable number.

10021110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021110221 is an equidigital number, since it uses as much as digits as its factorization.

10021110221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10021110221 its reverse (12201112001), we get a palindrome (22222222222).

The spelling of 10021110221 in words is "ten billion, twenty-one million, one hundred ten thousand, two hundred twenty-one".