218943076121 has 16 divisors (see below), whose sum is σ = 276256770048. Its totient is φ = 168549507600.

The previous prime is 218943076073. The next prime is 218943076139. The reversal of 218943076121 is 121670349812.

218943076121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 218943076121 - 2⁶ = 218943076057 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (218943076141) 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 15 ways as a sum of consecutive naturals, for example, 17122625 + ... + 17135406.

It is an arithmetic number, because the mean of its divisors is an integer number (17266048128).

Almost surely, 2^218943076121 is an apocalyptic number.

It is an amenable number.

218943076121 is a deficient number, since it is larger than the sum of its proper divisors (57313693927).

218943076121 is a wasteful number, since it uses less digits than its factorization.

218943076121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34258132.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 218943076121 in words is "two hundred eighteen billion, nine hundred forty-three million, seventy-six thousand, one hundred twenty-one".