123320203013 has 12 divisors (see below), whose sum is σ = 151892592012. Its totient is φ = 99485205120.

The previous prime is 123320202947. The next prime is 123320203063. The reversal of 123320203013 is 310302023321.

It can be written as a sum of positive squares in 2 ways, for example, as 35599387684 + 87720815329 = 188678^2 + 296177^2 .

It is not a de Polignac number, because 123320203013 - 2⁸ = 123320202757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123320203063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74020898 + ... + 74022563.

It is an arithmetic number, because the mean of its divisors is an integer number (12657716001).

Almost surely, 2^123320203013 is an apocalyptic number.

It is an amenable number.

123320203013 is a deficient number, since it is larger than the sum of its proper divisors (28572388999).

123320203013 is a wasteful number, since it uses less digits than its factorization.

123320203013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148043492 (or 148043485 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 123320203013 its reverse (310302023321), we get a palindrome (433622226334).

The spelling of 123320203013 in words is "one hundred twenty-three billion, three hundred twenty million, two hundred three thousand, thirteen".