423220125128 has 16 divisors (see below), whose sum is σ = 793683767580. Its totient is φ = 211571120448.

The previous prime is 423220125127. The next prime is 423220125241. The reversal of 423220125128 is 821521022324.

It can be written as a sum of positive squares in 2 ways, for example, as 422861477284 + 358647844 = 650278^2 + 18938^2 .

It is a junction number, because it is equal to n+sod(n) for n = 423220125094 and 423220125103.

It is not an unprimeable number, because it can be changed into a prime (423220125127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4821551 + ... + 4908542.

Almost surely, 2^423220125128 is an apocalyptic number.

It is an amenable number.

423220125128 is a deficient number, since it is larger than the sum of its proper divisors (370463642452).

423220125128 is a wasteful number, since it uses less digits than its factorization.

423220125128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9735536 (or 9735532 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The spelling of 423220125128 in words is "four hundred twenty-three billion, two hundred twenty million, one hundred twenty-five thousand, one hundred twenty-eight".