243203500121 has 8 divisors (see below), whose sum is σ = 243414777984. Its totient is φ = 242992282320.

The previous prime is 243203500109. The next prime is 243203500151. The reversal of 243203500121 is 121005302342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243203500121 is a prime.

It is a super-2 number, since 2×243203500121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243203500151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12063776 + ... + 12083918.

It is an arithmetic number, because the mean of its divisors is an integer number (30426847248).

Almost surely, 2^243203500121 is an apocalyptic number.

It is an amenable number.

243203500121 is a deficient number, since it is larger than the sum of its proper divisors (211277863).

243203500121 is a wasteful number, since it uses less digits than its factorization.

243203500121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30031.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 243203500121 its reverse (121005302342), we get a palindrome (364208802463).

The spelling of 243203500121 in words is "two hundred forty-three billion, two hundred three million, five hundred thousand, one hundred twenty-one".