2121212118 has 32 divisors (see below), whose sum is σ = 4269951360. Its totient is φ = 702495360.

The previous prime is 2121212101. The next prime is 2121212147. The reversal of 2121212118 is 8112121212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121212094 and 2121212103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 995278 + ... + 997406.

It is an arithmetic number, because the mean of its divisors is an integer number (133435980).

Almost surely, 2^2121212118 is an apocalyptic number.

2121212118 is an abundant number, since it is smaller than the sum of its proper divisors (2148739242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121212118 is a wasteful number, since it uses less digits than its factorization.

2121212118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132.

The product of its digits is 128, while the sum is 21.

The square root of 2121212118 is about 46056.6186123124. The cubic root of 2121212118 is about 1284.8764420656.

The spelling of 2121212118 in words is "two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred eighteen".