211141204121 has 4 divisors (see below), whose sum is σ = 211210456500. Its totient is φ = 211071951744.

The previous prime is 211141204111. The next prime is 211141204139. The reversal of 211141204121 is 121402141112.

211141204121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16695482521 + 194445721600 = 129211^2 + 440960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211141204121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211141204093 and 211141204102.

It is not an unprimeable number, because it can be changed into a prime (211141204111) 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 3 ways as a sum of consecutive naturals, for example, 34621616 + ... + 34627713.

It is an arithmetic number, because the mean of its divisors is an integer number (52802614125).

Almost surely, 2^211141204121 is an apocalyptic number.

It is an amenable number.

211141204121 is a deficient number, since it is larger than the sum of its proper divisors (69252379).

211141204121 is an equidigital number, since it uses as much as digits as its factorization.

211141204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69252378.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211141204121 its reverse (121402141112), we get a palindrome (332543345233).

The spelling of 211141204121 in words is "two hundred eleven billion, one hundred forty-one million, two hundred four thousand, one hundred twenty-one".