1023305123305 has 4 divisors (see below), whose sum is σ = 1227966147972. Its totient is φ = 818644098640.

The previous prime is 1023305123237. The next prime is 1023305123339. The reversal of 1023305123305 is 5033215033201.

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 573733532304 + 449571591001 = 757452^2 + 670501^2 .

It is not a de Polignac number, because 1023305123305 - 2⁹ = 1023305122793 is a prime.

It is a super-2 number, since 2×1023305123305² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102330512326 + ... + 102330512335.

It is an arithmetic number, because the mean of its divisors is an integer number (306991536993).

Almost surely, 2^{1023305123305} is an apocalyptic number.

It is an amenable number.

1023305123305 is a deficient number, since it is larger than the sum of its proper divisors (204661024667).

1023305123305 is an equidigital number, since it uses as much as digits as its factorization.

1023305123305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204661024666.

The product of its (nonzero) digits is 8100, while the sum is 28.

The spelling of 1023305123305 in words is "one trillion, twenty-three billion, three hundred five million, one hundred twenty-three thousand, three hundred five".