823478211122 has 54 divisors (see below), whose sum is σ = 1485234069021. Its totient is φ = 341419241520.

The previous prime is 823478211113. The next prime is 823478211263. The reversal of 823478211122 is 221112874328.

823478211122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 732104408161 + 91373802961 = 855631^2 + 302281^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=641669.

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 823478211122.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 278482868 + ... + 278485824.

Almost surely, 2^823478211122 is an apocalyptic number.

823478211122 is a deficient number, since it is larger than the sum of its proper divisors (661755857899).

823478211122 is an frugal number, since it uses more digits than its factorization.

823478211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5992 (or 2997 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The spelling of 823478211122 in words is "eight hundred twenty-three billion, four hundred seventy-eight million, two hundred eleven thousand, one hundred twenty-two".