201221200101 has 32 divisors (see below), whose sum is σ = 287880324480. Its totient is φ = 124630272000.

The previous prime is 201221200091. The next prime is 201221200151. The reversal of 201221200101 is 101002122102.

It is not a de Polignac number, because 201221200101 - 2¹⁴ = 201221183717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221200151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6876301 + ... + 6905501.

It is an arithmetic number, because the mean of its divisors is an integer number (8996260140).

Almost surely, 2^201221200101 is an apocalyptic number.

It is an amenable number.

201221200101 is a deficient number, since it is larger than the sum of its proper divisors (86659124379).

201221200101 is a wasteful number, since it uses less digits than its factorization.

201221200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31557.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201221200101 its reverse (101002122102), we get a palindrome (302223322203).

The spelling of 201221200101 in words is "two hundred one billion, two hundred twenty-one million, two hundred thousand, one hundred one".