10221021110221 has 4 divisors (see below), whose sum is σ = 10221140805532. Its totient is φ = 10220901414912.

The previous prime is 10221021110159. The next prime is 10221021110231. The reversal of 10221021110221 is 12201112012201.

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 6935190575625 + 3285830534596 = 2633475^2 + 1812686^2 .

It is a cyclic number.

It is not a de Polignac number, because 10221021110221 - 2²⁷ = 10220886892493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221021110195 and 10221021110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221021110231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59719476 + ... + 59890381.

It is an arithmetic number, because the mean of its divisors is an integer number (2555285201383).

Almost surely, 2^{10221021110221} is an apocalyptic number.

It is an amenable number.

10221021110221 is a deficient number, since it is larger than the sum of its proper divisors (119695311).

10221021110221 is an equidigital number, since it uses as much as digits as its factorization.

10221021110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119695310.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10221021110221 its reverse (12201112012201), we get a palindrome (22422133122422).

The spelling of 10221021110221 in words is "ten trillion, two hundred twenty-one billion, twenty-one million, one hundred ten thousand, two hundred twenty-one".