10210121220221 has 4 divisors (see below), whose sum is σ = 10995515160252. Its totient is φ = 9424727280192.

The previous prime is 10210121220203. The next prime is 10210121220239. The reversal of 10210121220221 is 12202212101201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (10210121220203) and next prime (10210121220239).

It can be written as a sum of positive squares in 2 ways, for example, as 3988064916196 + 6222056304025 = 1997014^2 + 2494405^2 .

It is a cyclic number.

It is not a de Polignac number, because 10210121220221 - 2⁶ = 10210121220157 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 10210121220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10210121220251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392696969996 + ... + 392696970021.

It is an arithmetic number, because the mean of its divisors is an integer number (2748878790063).

Almost surely, 2^{10210121220221} is an apocalyptic number.

It is an amenable number.

10210121220221 is a deficient number, since it is larger than the sum of its proper divisors (785393940031).

10210121220221 is an equidigital number, since it uses as much as digits as its factorization.

10210121220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785393940030.

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

Adding to 10210121220221 its reverse (12202212101201), we get a palindrome (22412333321422).

The spelling of 10210121220221 in words is "ten trillion, two hundred ten billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".