201221020202221 has 8 divisors (see below), whose sum is σ = 202264023515840. Its totient is φ = 200178021088512.

The previous prime is 201221020202161. The next prime is 201221020202243. The reversal of 201221020202221 is 122202020122102.

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

It is a cyclic number.

It is not a de Polignac number, because 201221020202221 - 2¹⁵ = 201221020169453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221020202621) 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, 154841266 + ... + 156135388.

It is an arithmetic number, because the mean of its divisors is an integer number (25283002939480).

Almost surely, 2^{201221020202221} is an apocalyptic number.

It is an amenable number.

201221020202221 is a deficient number, since it is larger than the sum of its proper divisors (1043003313619).

201221020202221 is a wasteful number, since it uses less digits than its factorization.

201221020202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099955.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201221020202221 its reverse (122202020122102), we get a palindrome (323423040324323).

The spelling of 201221020202221 in words is "two hundred one trillion, two hundred twenty-one billion, twenty million, two hundred two thousand, two hundred twenty-one".