10201221001 has 2 divisors, whose sum is σ = 10201221002. Its totient is φ = 10201221000.

The previous prime is 10201220993. The next prime is 10201221007. The reversal of 10201221001 is 10012210201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5579940601 + 4621280400 = 74699^2 + 67980^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201221001 - 2³ = 10201220993 is a prime.

It is a super-3 number, since 3×10201221001³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (10201221007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100610500 + 5100610501.

It is an arithmetic number, because the mean of its divisors is an integer number (5100610501).

Almost surely, 2^10201221001 is an apocalyptic number.

It is an amenable number.

10201221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201221001 is an equidigital number, since it uses as much as digits as its factorization.

10201221001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10201221001 its reverse (10012210201), we get a palindrome (20213431202).

The spelling of 10201221001 in words is "ten billion, two hundred one million, two hundred twenty-one thousand, one".