2121211118 has 16 divisors (see below), whose sum is σ = 3428282256. Its totient is φ = 978531840.

The previous prime is 2121211111. The next prime is 2121211139. The reversal of 2121211118 is 8111121212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121211118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121211111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35633 + ... + 74243.

It is an arithmetic number, because the mean of its divisors is an integer number (214267641).

Almost surely, 2^2121211118 is an apocalyptic number.

2121211118 is a deficient number, since it is larger than the sum of its proper divisors (1307071138).

2121211118 is a wasteful number, since it uses less digits than its factorization.

2121211118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40739.

The product of its digits is 64, while the sum is 20.

The square root of 2121211118 is about 46056.6077561081. The cubic root of 2121211118 is about 1284.8762401564.

The spelling of 2121211118 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred eighteen".