10201222001221 has 4 divisors (see below), whose sum is σ = 10368455148844. Its totient is φ = 10033988853600.

The previous prime is 10201222001189. The next prime is 10201222001263. The reversal of 10201222001221 is 12210022210201.

It is a happy number.

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 4616649552321 + 5584572448900 = 2148639^2 + 2363170^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201222001221 - 2⁵ = 10201222001189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10201222001195 and 10201222001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201222008221) 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, 83616573720 + ... + 83616573841.

It is an arithmetic number, because the mean of its divisors is an integer number (2592113787211).

Almost surely, 2^{10201222001221} is an apocalyptic number.

It is an amenable number.

10201222001221 is a deficient number, since it is larger than the sum of its proper divisors (167233147623).

10201222001221 is an equidigital number, since it uses as much as digits as its factorization.

10201222001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167233147622.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10201222001221 its reverse (12210022210201), we get a palindrome (22411244211422).

The spelling of 10201222001221 in words is "ten trillion, two hundred one billion, two hundred twenty-two million, one thousand, two hundred twenty-one".