321730507123 has 2 divisors, whose sum is σ = 321730507124. Its totient is φ = 321730507122.

The previous prime is 321730507121. The next prime is 321730507139. The reversal of 321730507123 is 321705037123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321730507123 - 2¹ = 321730507121 is a prime.

Together with 321730507121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321730507121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160865253561 + 160865253562.

It is an arithmetic number, because the mean of its divisors is an integer number (160865253562).

Almost surely, 2^321730507123 is an apocalyptic number.

321730507123 is a deficient number, since it is larger than the sum of its proper divisors (1).

321730507123 is an equidigital number, since it uses as much as digits as its factorization.

321730507123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 34.

The spelling of 321730507123 in words is "three hundred twenty-one billion, seven hundred thirty million, five hundred seven thousand, one hundred twenty-three".