201211122121 has 8 divisors (see below), whose sum is σ = 214353004320. Its totient is φ = 188324422272.

The previous prime is 201211122107. The next prime is 201211122127. The reversal of 201211122121 is 121221112102.

201211122121 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 a cyclic number.

It is not a de Polignac number, because 201211122121 - 2²¹ = 201209024969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201211122095 and 201211122104.

It is not an unprimeable number, because it can be changed into a prime (201211122127) 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, 63793960 + ... + 63797113.

It is an arithmetic number, because the mean of its divisors is an integer number (26794125540).

Almost surely, 2^201211122121 is an apocalyptic number.

It is an amenable number.

201211122121 is a deficient number, since it is larger than the sum of its proper divisors (13141882199).

201211122121 is a wasteful number, since it uses less digits than its factorization.

201211122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127591175.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201211122121 its reverse (121221112102), we get a palindrome (322432234223).

The spelling of 201211122121 in words is "two hundred one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".