201221022221211 has 8 divisors (see below), whose sum is σ = 268295246500864. Its totient is φ = 134147073044520.

The previous prime is 201221022221209. The next prime is 201221022221213. The reversal of 201221022221211 is 112122220122102.

It is an interprime number because it is at equal distance from previous prime (201221022221209) and next prime (201221022221213).

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

It is not a de Polignac number, because 201221022221211 - 2¹ = 201221022221209 is a prime.

It is a super-4 number, since 4×201221022221211⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221022221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67062955 + ... + 69999156.

It is an arithmetic number, because the mean of its divisors is an integer number (33536905812608).

Almost surely, 2^{201221022221211} is an apocalyptic number.

201221022221211 is a deficient number, since it is larger than the sum of its proper divisors (67074224279653).

201221022221211 is a wasteful number, since it uses less digits than its factorization.

201221022221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137551481.

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

Adding to 201221022221211 its reverse (112122220122102), we get a palindrome (313343242343313).

The spelling of 201221022221211 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred eleven".