201221021122221 has 8 divisors (see below), whose sum is σ = 268309675899360. Its totient is φ = 134139856879952.

The previous prime is 201221021122157. The next prime is 201221021122309. The reversal of 201221021122221 is 122221120122102.

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 201221021122221 - 2⁶ = 201221021122157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221021122421) 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, 1872571035 + ... + 1872678488.

It is an arithmetic number, because the mean of its divisors is an integer number (33538709487420).

Almost surely, 2^{201221021122221} is an apocalyptic number.

It is an amenable number.

201221021122221 is a deficient number, since it is larger than the sum of its proper divisors (67088654777139).

201221021122221 is a wasteful number, since it uses less digits than its factorization.

201221021122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745267435.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 201221021122221 its reverse (122221120122102), we get a palindrome (323442141244323).

The spelling of 201221021122221 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".