201121201211 has 4 divisors (see below), whose sum is σ = 229852801392. Its totient is φ = 172389601032.

The previous prime is 201121201199. The next prime is 201121201231. The reversal of 201121201211 is 112102121102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112102121102 = 2 ⋅56051060551.

It is a cyclic number.

It is not a de Polignac number, because 201121201211 - 2¹⁰ = 201121200187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121201231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14365800080 + ... + 14365800093.

It is an arithmetic number, because the mean of its divisors is an integer number (57463200348).

Almost surely, 2^201121201211 is an apocalyptic number.

201121201211 is a deficient number, since it is larger than the sum of its proper divisors (28731600181).

201121201211 is an equidigital number, since it uses as much as digits as its factorization.

201121201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28731600180.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201121201211 its reverse (112102121102), we get a palindrome (313223322313).

The spelling of 201121201211 in words is "two hundred one billion, one hundred twenty-one million, two hundred one thousand, two hundred eleven".