218701107812 has 72 divisors (see below), whose sum is σ = 426865741848. Its totient is φ = 97957601280.

The previous prime is 218701107811. The next prime is 218701107847.

218701107812 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 13868830756 + 204832277056 = 117766^2 + 452584^2 .

It is not an unprimeable number, because it can be changed into a prime (218701107811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10928888 + ... + 10948880.

It is an arithmetic number, because the mean of its divisors is an integer number (5928690859).

Almost surely, 2^218701107812 is an apocalyptic number.

218701107812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218701107812 is a deficient number, since it is larger than the sum of its proper divisors (208164634036).

218701107812 is a wasteful number, since it uses less digits than its factorization.

218701107812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20349 (or 20336 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 38.

The spelling of 218701107812 in words is "two hundred eighteen billion, seven hundred one million, one hundred seven thousand, eight hundred twelve".