10211210220221 has 12 divisors (see below), whose sum is σ = 10594049212500. Its totient is φ = 9841771997568.

The previous prime is 10211210220191. The next prime is 10211210220301. The reversal of 10211210220221 is 12202201211201.

It can be written as a sum of positive squares in 6 ways, for example, as 1909954404121 + 8301255816100 = 1382011^2 + 2881190^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10211210220221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10211210220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211210220721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10190846 + ... + 11147903.

It is an arithmetic number, because the mean of its divisors is an integer number (882837434375).

Almost surely, 2^{10211210220221} is an apocalyptic number.

It is an amenable number.

10211210220221 is a deficient number, since it is larger than the sum of its proper divisors (382838992279).

10211210220221 is an equidigital number, since it uses as much as digits as its factorization.

10211210220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21339376 (or 21339347 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10211210220221 its reverse (12202201211201), we get a palindrome (22413411431422).

The spelling of 10211210220221 in words is "ten trillion, two hundred eleven billion, two hundred ten million, two hundred twenty thousand, two hundred twenty-one".