1305550023123 has 4 divisors (see below), whose sum is σ = 1740733364168. Its totient is φ = 870366682080.

The previous prime is 1305550023101. The next prime is 1305550023139. The reversal of 1305550023123 is 3213200555031.

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

It is not a de Polignac number, because 1305550023123 - 2¹⁶ = 1305549957587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305550023143) 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, 217591670518 + ... + 217591670523.

It is an arithmetic number, because the mean of its divisors is an integer number (435183341042).

Almost surely, 2^{1305550023123} is an apocalyptic number.

1305550023123 is a deficient number, since it is larger than the sum of its proper divisors (435183341045).

1305550023123 is an equidigital number, since it uses as much as digits as its factorization.

1305550023123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435183341044.

The product of its (nonzero) digits is 13500, while the sum is 30.

Adding to 1305550023123 its reverse (3213200555031), we get a palindrome (4518750578154).

The spelling of 1305550023123 in words is "one trillion, three hundred five billion, five hundred fifty million, twenty-three thousand, one hundred twenty-three".