10211110100221 has 4 divisors (see below), whose sum is σ = 10211117225500. Its totient is φ = 10211102974944.

The previous prime is 10211110100209. The next prime is 10211110100237. The reversal of 10211110100221 is 12200101111201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3610706834596 + 6600403265625 = 1900186^2 + 2569125^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211110100221 - 2¹¹ = 10211110098173 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 (10211110100251) 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, 581496 + ... + 4556353.

It is an arithmetic number, because the mean of its divisors is an integer number (2552779306375).

Almost surely, 2^{10211110100221} is an apocalyptic number.

It is an amenable number.

10211110100221 is a deficient number, since it is larger than the sum of its proper divisors (7125279).

10211110100221 is an equidigital number, since it uses as much as digits as its factorization.

10211110100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7125278.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10211110100221 its reverse (12200101111201), we get a palindrome (22411211211422).

The spelling of 10211110100221 in words is "ten trillion, two hundred eleven billion, one hundred ten million, one hundred thousand, two hundred twenty-one".