818127711122 has 18 divisors (see below), whose sum is σ = 1234660125663. Its totient is φ = 406589316672.

The previous prime is 818127711019. The next prime is 818127711217. The reversal of 818127711122 is 221117721818.

It can be written as a sum of positive squares in 5 ways, for example, as 407617125601 + 410510585521 = 638449^2 + 640711^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=639581.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 818127711122.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 221293178 + ... + 221296874.

Almost surely, 2^818127711122 is an apocalyptic number.

818127711122 is a deficient number, since it is larger than the sum of its proper divisors (416532414541).

818127711122 is an frugal number, since it uses more digits than its factorization.

818127711122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742 (or 3872 counting only the distinct ones).

The product of its digits is 25088, while the sum is 41.

The spelling of 818127711122 in words is "eight hundred eighteen billion, one hundred twenty-seven million, seven hundred eleven thousand, one hundred twenty-two".