812101218 has 16 divisors (see below), whose sum is σ = 1629113376. Its totient is φ = 269881920.

The previous prime is 812101201. The next prime is 812101219.

812101218 is nontrivially palindromic in base 10.

812101218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (812101219) 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, 202471 + ... + 206442.

It is an arithmetic number, because the mean of its divisors is an integer number (101819586).

Almost surely, 2^812101218 is an apocalyptic number.

812101218 is an abundant number, since it is smaller than the sum of its proper divisors (817012158).

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

812101218 is a wasteful number, since it uses less digits than its factorization.

812101218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409249.

The product of its (nonzero) digits is 256, while the sum is 24.

The square root of 812101218 is about 28497.3896699329. The cubic root of 812101218 is about 932.9751018354.

It can be divided in two parts, 81210 and 1218, that added together give a palindrome (82428).

The spelling of 812101218 in words is "eight hundred twelve million, one hundred one thousand, two hundred eighteen".