423431403121 has 4 divisors (see below), whose sum is σ = 431420674932. Its totient is φ = 415442131312.

The previous prime is 423431403113. The next prime is 423431403169. The reversal of 423431403121 is 121304134324.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127316944225 + 296114458896 = 356815^2 + 544164^2 .

It is a cyclic number.

It is not a de Polignac number, because 423431403121 - 2³ = 423431403113 is a prime.

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 423431403121.

It is not an unprimeable number, because it can be changed into a prime (423431403181) 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, 3994635826 + ... + 3994635931.

It is an arithmetic number, because the mean of its divisors is an integer number (107855168733).

Almost surely, 2^423431403121 is an apocalyptic number.

It is an amenable number.

423431403121 is a deficient number, since it is larger than the sum of its proper divisors (7989271811).

423431403121 is an equidigital number, since it uses as much as digits as its factorization.

423431403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989271810.

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

Adding to 423431403121 its reverse (121304134324), we get a palindrome (544735537445).

The spelling of 423431403121 in words is "four hundred twenty-three billion, four hundred thirty-one million, four hundred three thousand, one hundred twenty-one".