243120138301 has 4 divisors (see below), whose sum is σ = 243122997600. Its totient is φ = 243117279004.

The previous prime is 243120138299. The next prime is 243120138329. The reversal of 243120138301 is 103831021342.

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.

It is a cyclic number.

It is not a de Polignac number, because 243120138301 - 2¹ = 243120138299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243120138301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120135301) 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, 1298071 + ... + 1473508.

It is an arithmetic number, because the mean of its divisors is an integer number (60780749400).

Almost surely, 2^243120138301 is an apocalyptic number.

It is an amenable number.

243120138301 is a deficient number, since it is larger than the sum of its proper divisors (2859299).

243120138301 is an equidigital number, since it uses as much as digits as its factorization.

243120138301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859298.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 243120138301 its reverse (103831021342), we get a palindrome (346951159643).

The spelling of 243120138301 in words is "two hundred forty-three billion, one hundred twenty million, one hundred thirty-eight thousand, three hundred one".