201221201211 has 16 divisors (see below), whose sum is σ = 270149894784. Its totient is φ = 133221262464.

The previous prime is 201221201119. The next prime is 201221201213. The reversal of 201221201211 is 112102122102.

It is not a de Polignac number, because 201221201211 - 2¹⁵ = 201221168443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201221201213) 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, 475600 + ... + 792866.

It is an arithmetic number, because the mean of its divisors is an integer number (16884368424).

Almost surely, 2^201221201211 is an apocalyptic number.

201221201211 is a deficient number, since it is larger than the sum of its proper divisors (68928693573).

201221201211 is a wasteful number, since it uses less digits than its factorization.

201221201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318730.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201221201211 its reverse (112102122102), we get a palindrome (313323323313).

The spelling of 201221201211 in words is "two hundred one billion, two hundred twenty-one million, two hundred one thousand, two hundred eleven".