423123101321 has 4 divisors (see below), whose sum is σ = 423127760532. Its totient is φ = 423118442112.

The previous prime is 423123101299. The next prime is 423123101329. The reversal of 423123101321 is 123101321324.

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 253045217296 + 170077884025 = 503036^2 + 412405^2 .

It is a cyclic number.

It is not a de Polignac number, because 423123101321 - 2⁶ = 423123101257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423123101329) 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, 2190620 + ... + 2375933.

It is an arithmetic number, because the mean of its divisors is an integer number (105781940133).

Almost surely, 2^423123101321 is an apocalyptic number.

It is an amenable number.

423123101321 is a deficient number, since it is larger than the sum of its proper divisors (4659211).

423123101321 is an equidigital number, since it uses as much as digits as its factorization.

423123101321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659210.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 423123101321 its reverse (123101321324), we get a palindrome (546224422645).

The spelling of 423123101321 in words is "four hundred twenty-three billion, one hundred twenty-three million, one hundred one thousand, three hundred twenty-one".