201211022121 has 8 divisors (see below), whose sum is σ = 275532210624. Its totient is φ = 130515257520.

The previous prime is 201211022099. The next prime is 201211022137. The reversal of 201211022121 is 121220112102.

201211022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201211022121 - 2¹³ = 201211013929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201211022121.

It is not an unprimeable number, because it can be changed into a prime (201211022321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906355845 + ... + 906356066.

It is an arithmetic number, because the mean of its divisors is an integer number (34441526328).

Almost surely, 2^201211022121 is an apocalyptic number.

It is an amenable number.

201211022121 is a deficient number, since it is larger than the sum of its proper divisors (74321188503).

201211022121 is a wasteful number, since it uses less digits than its factorization.

201211022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812711951.

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

Adding to 201211022121 its reverse (121220112102), we get a palindrome (322431134223).

The spelling of 201211022121 in words is "two hundred one billion, two hundred eleven million, twenty-two thousand, one hundred twenty-one".