201121001200111 has 4 divisors (see below), whose sum is σ = 201121196586112. Its totient is φ = 201120805814112.

The previous prime is 201121001200099. The next prime is 201121001200127. The reversal of 201121001200111 is 111002100121102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201121001200111 - 2¹⁵ = 201121001167343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121001200091 and 201121001200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121001201111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96140751 + ... + 98210416.

It is an arithmetic number, because the mean of its divisors is an integer number (50280299146528).

Almost surely, 2^{201121001200111} is an apocalyptic number.

201121001200111 is a deficient number, since it is larger than the sum of its proper divisors (195386001).

201121001200111 is a wasteful number, since it uses less digits than its factorization.

201121001200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195386000.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201121001200111 its reverse (111002100121102), we get a palindrome (312123101321213).

The spelling of 201121001200111 in words is "two hundred one trillion, one hundred twenty-one billion, one million, two hundred thousand, one hundred eleven".