201221002002111 has 16 divisors (see below), whose sum is σ = 330208823798784. Its totient is φ = 106138550506464.

The previous prime is 201221002002077. The next prime is 201221002002113. The reversal of 201221002002111 is 111200200122102.

It is not a de Polignac number, because 201221002002111 - 2⁶ = 201221002002047 is a prime.

It is a super-3 number, since 3×201221002002111³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221002002113) 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, 368536633431 + ... + 368536633976.

It is an arithmetic number, because the mean of its divisors is an integer number (20638051487424).

Almost surely, 2^{201221002002111} is an apocalyptic number.

201221002002111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201221002002111 is a deficient number, since it is larger than the sum of its proper divisors (128987821796673).

201221002002111 is a wasteful number, since it uses less digits than its factorization.

201221002002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737073267430.

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

Adding to 201221002002111 its reverse (111200200122102), we get a palindrome (312421202124213).

The spelling of 201221002002111 in words is "two hundred one trillion, two hundred twenty-one billion, two million, two thousand, one hundred eleven".