123128223268 has 12 divisors (see below), whose sum is σ = 216091798300. Its totient is φ = 61387709472.

The previous prime is 123128223241. The next prime is 123128223293. The reversal of 123128223268 is 862322821321.

It can be written as a sum of positive squares in 2 ways, for example, as 98519398884 + 24608824384 = 313878^2 + 156872^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123128223268.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44098971 + ... + 44101762.

Almost surely, 2^123128223268 is an apocalyptic number.

It is an amenable number.

123128223268 is a deficient number, since it is larger than the sum of its proper divisors (92963575032).

123128223268 is a wasteful number, since it uses less digits than its factorization.

123128223268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88201086 (or 88201084 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The spelling of 123128223268 in words is "one hundred twenty-three billion, one hundred twenty-eight million, two hundred twenty-three thousand, two hundred sixty-eight".