201221321001211 has 16 divisors (see below), whose sum is σ = 242102787494400. Its totient is φ = 163376147285568.

The previous prime is 201221321001137. The next prime is 201221321001221. The reversal of 201221321001211 is 112100123122102.

It is not a de Polignac number, because 201221321001211 - 2³¹ = 201219173517563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (201221321001221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99070210 + ... + 101080903.

It is an arithmetic number, because the mean of its divisors is an integer number (15131424218400).

Almost surely, 2^{201221321001211} is an apocalyptic number.

201221321001211 is a deficient number, since it is larger than the sum of its proper divisors (40881466493189).

201221321001211 is a wasteful number, since it uses less digits than its factorization.

201221321001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200158698.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 201221321001211 its reverse (112100123122102), we get a palindrome (313321444123313).

The spelling of 201221321001211 in words is "two hundred one trillion, two hundred twenty-one billion, three hundred twenty-one million, one thousand, two hundred eleven".