123144444013 has 4 divisors (see below), whose sum is σ = 129625730560. Its totient is φ = 116663157468.

The previous prime is 123144444011. The next prime is 123144444041. The reversal of 123144444013 is 310444441321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310444441321 = 7 ⋅44349205903.

It is a cyclic number.

It is not a de Polignac number, because 123144444013 - 2¹ = 123144444011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123144444011) 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, 3240643245 + ... + 3240643282.

It is an arithmetic number, because the mean of its divisors is an integer number (32406432640).

Almost surely, 2^123144444013 is an apocalyptic number.

It is an amenable number.

123144444013 is a deficient number, since it is larger than the sum of its proper divisors (6481286547).

123144444013 is an equidigital number, since it uses as much as digits as its factorization.

123144444013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6481286546.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 123144444013 its reverse (310444441321), we get a palindrome (433588885334).

The spelling of 123144444013 in words is "one hundred twenty-three billion, one hundred forty-four million, four hundred forty-four thousand, thirteen".