221211121000121 has 16 divisors (see below), whose sum is σ = 256376026948608. Its totient is φ = 186937098003600.

The previous prime is 221211121000099. The next prime is 221211121000141. The reversal of 221211121000121 is 121000121112122.

221211121000121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221211121000121 - 2³⁴ = 221193941130937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221211121000121.

It is not an unprimeable number, because it can be changed into a prime (221211121000141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48455666 + ... + 52823988.

It is an arithmetic number, because the mean of its divisors is an integer number (16023501684288).

Almost surely, 2^{221211121000121} is an apocalyptic number.

It is an amenable number.

221211121000121 is a deficient number, since it is larger than the sum of its proper divisors (35164905948487).

221211121000121 is a wasteful number, since it uses less digits than its factorization.

221211121000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470292.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221211121000121 its reverse (121000121112122), we get a palindrome (342211242112243).

The spelling of 221211121000121 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty-one", and thus it is an aban number.