201221102221001 has 8 divisors (see below), whose sum is σ = 201319626372480. Its totient is φ = 201122586683568.

The previous prime is 201221102220989. The next prime is 201221102221031. The reversal of 201221102221001 is 100122201122102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221102221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221102221031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44827955 + ... + 49111991.

It is an arithmetic number, because the mean of its divisors is an integer number (25164953296560).

Almost surely, 2^{201221102221001} is an apocalyptic number.

It is an amenable number.

201221102221001 is a deficient number, since it is larger than the sum of its proper divisors (98524151479).

201221102221001 is a wasteful number, since it uses less digits than its factorization.

201221102221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307023.

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

Adding to 201221102221001 its reverse (100122201122102), we get a palindrome (301343303343103).

The spelling of 201221102221001 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, one".