201211010121201 has 16 divisors (see below), whose sum is σ = 272173838302080. Its totient is φ = 132196009357440.

The previous prime is 201211010121179. The next prime is 201211010121211. The reversal of 201211010121201 is 102121010112102.

It is a happy number.

It is not a de Polignac number, because 201211010121201 - 2⁹ = 201211010120689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201211010121211) 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 15 ways as a sum of consecutive naturals, for example, 197199940 + ... + 198217653.

It is an arithmetic number, because the mean of its divisors is an integer number (17010864893880).

Almost surely, 2^{201211010121201} is an apocalyptic number.

It is an amenable number.

201211010121201 is a deficient number, since it is larger than the sum of its proper divisors (70962828180879).

201211010121201 is a wasteful number, since it uses less digits than its factorization.

201211010121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395420056.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201211010121201 its reverse (102121010112102), we get a palindrome (303332020233303).

Subtracting from 201211010121201 its reverse (102121010112102), we obtain a palindrome (99090000009099).

It can be divided in two parts, 201211010 and 121201, that added together give a triangular number (201332211 = T₂₀₀₆₆).

The spelling of 201211010121201 in words is "two hundred one trillion, two hundred eleven billion, ten million, one hundred twenty-one thousand, two hundred one".