423121334140 has 96 divisors (see below), whose sum is σ = 923894294400. Its totient is φ = 162657792000.

The previous prime is 423121334123. The next prime is 423121334189. The reversal of 423121334140 is 41433121324.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 423121334099 and 423121334108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16468344 + ... + 16494016.

It is an arithmetic number, because the mean of its divisors is an integer number (9623898900).

Almost surely, 2^423121334140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423121334140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461947147200).

423121334140 is an abundant number, since it is smaller than the sum of its proper divisors (500772960260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423121334140 is a wasteful number, since it uses less digits than its factorization.

423121334140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26023 (or 26021 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 423121334140 its reverse (41433121324), we get a palindrome (464554455464).

The spelling of 423121334140 in words is "four hundred twenty-three billion, one hundred twenty-one million, three hundred thirty-four thousand, one hundred forty".