2100021218 has 8 divisors (see below), whose sum is σ = 3153090240. Its totient is φ = 1048991140.

The previous prime is 2100021181. The next prime is 2100021281. The reversal of 2100021218 is 8121200012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2100021196 and 2100021205.

It is an unprimeable number.

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, 507158 + ... + 511281.

It is an arithmetic number, because the mean of its divisors is an integer number (394136280).

Almost surely, 2^2100021218 is an apocalyptic number.

2100021218 is a deficient number, since it is larger than the sum of its proper divisors (1053069022).

2100021218 is a wasteful number, since it uses less digits than its factorization.

2100021218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019472.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 2100021218 is about 45825.9884563334. The cubic root of 2100021218 is about 1280.5834778823.

The spelling of 2100021218 in words is "two billion, one hundred million, twenty-one thousand, two hundred eighteen".