123315011205 has 32 divisors (see below), whose sum is σ = 201021143040. Its totient is φ = 64540492800.

The previous prime is 123315011203. The next prime is 123315011207. The reversal of 123315011205 is 502110513321.

It is an interprime number because it is at equal distance from previous prime (123315011203) and next prime (123315011207).

It is not a de Polignac number, because 123315011205 - 2¹ = 123315011203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123315011203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188965 + ... + 531354.

It is an arithmetic number, because the mean of its divisors is an integer number (6281910720).

Almost surely, 2^123315011205 is an apocalyptic number.

123315011205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123315011205 is a deficient number, since it is larger than the sum of its proper divisors (77706131835).

123315011205 is a wasteful number, since it uses less digits than its factorization.

123315011205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720541.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 123315011205 its reverse (502110513321), we get a palindrome (625425524526).

The spelling of 123315011205 in words is "one hundred twenty-three billion, three hundred fifteen million, eleven thousand, two hundred five".