203124243013 has 4 divisors (see below), whose sum is σ = 203125514508. Its totient is φ = 203122971520.

The previous prime is 203124242999. The next prime is 203124243037. The reversal of 203124243013 is 310342421302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310342421302 = 2 ⋅155171210651.

It can be written as a sum of positive squares in 2 ways, for example, as 133925257764 + 69198985249 = 365958^2 + 263057^2 .

It is a cyclic number.

It is not a de Polignac number, because 203124243013 - 2²¹ = 203122145861 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 (203124243053) 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, 354706 + ... + 729427.

It is an arithmetic number, because the mean of its divisors is an integer number (50781378627).

Almost surely, 2^203124243013 is an apocalyptic number.

It is an amenable number.

203124243013 is a deficient number, since it is larger than the sum of its proper divisors (1271495).

203124243013 is a wasteful number, since it uses less digits than its factorization.

203124243013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271494.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 203124243013 its reverse (310342421302), we get a palindrome (513466664315).

The spelling of 203124243013 in words is "two hundred three billion, one hundred twenty-four million, two hundred forty-three thousand, thirteen".