201221012211 has 16 divisors (see below), whose sum is σ = 269295307008. Its totient is φ = 133647472800.

The previous prime is 201221012171. The next prime is 201221012221. The reversal of 201221012211 is 112210122102.

It is not a de Polignac number, because 201221012211 - 2⁶ = 201221012147 is a prime.

It is a super-2 number, since 2×201221012211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201221012221) 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, 1799601 + ... + 1908141.

It is an arithmetic number, because the mean of its divisors is an integer number (16830956688).

Almost surely, 2^201221012211 is an apocalyptic number.

201221012211 is a deficient number, since it is larger than the sum of its proper divisors (68074294797).

201221012211 is a wasteful number, since it uses less digits than its factorization.

201221012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110842.

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

Adding to 201221012211 its reverse (112210122102), we get a palindrome (313431134313).

The spelling of 201221012211 in words is "two hundred one billion, two hundred twenty-one million, twelve thousand, two hundred eleven".