2111021218 has 8 divisors (see below), whose sum is σ = 3189645612. Its totient is φ = 1047806016.

The previous prime is 2111021147. The next prime is 2111021219. The reversal of 2111021218 is 8121201112.

It can be written as a sum of positive squares in 2 ways, for example, as 1929229929 + 181791289 = 43923^2 + 13483^2 .

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 = 2111021195 and 2111021204.

It is not an unprimeable number, because it can be changed into a prime (2111021219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3851955 + ... + 3852502.

Almost surely, 2^2111021218 is an apocalyptic number.

2111021218 is a deficient number, since it is larger than the sum of its proper divisors (1078624394).

2111021218 is a wasteful number, since it uses less digits than its factorization.

2111021218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704596.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 2111021218 is about 45945.8509334630. The cubic root of 2111021218 is about 1282.8155020756.

The spelling of 2111021218 in words is "two billion, one hundred eleven million, twenty-one thousand, two hundred eighteen".