423122002321 has 4 divisors (see below), whose sum is σ = 424566105012. Its totient is φ = 421677899632.

The previous prime is 423122002253. The next prime is 423122002337. The reversal of 423122002321 is 123200221324.

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 259986792321 + 163135210000 = 509889^2 + 403900^2 .

It is a cyclic number.

It is not a de Polignac number, because 423122002321 - 2¹³ = 423121994129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423122002292 and 423122002301.

It is not an unprimeable number, because it can be changed into a prime (423122008321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722050906 + ... + 722051491.

It is an arithmetic number, because the mean of its divisors is an integer number (106141526253).

Almost surely, 2^423122002321 is an apocalyptic number.

It is an amenable number.

423122002321 is a deficient number, since it is larger than the sum of its proper divisors (1444102691).

423122002321 is a wasteful number, since it uses less digits than its factorization.

423122002321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444102690.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 423122002321 its reverse (123200221324), we get a palindrome (546322223645).

The spelling of 423122002321 in words is "four hundred twenty-three billion, one hundred twenty-two million, two thousand, three hundred twenty-one".