243203232121 has 8 divisors (see below), whose sum is σ = 253940857920. Its totient is φ = 232622360208.

The previous prime is 243203232119. The next prime is 243203232131. The reversal of 243203232121 is 121232302342.

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

It is a cyclic number.

It is not a de Polignac number, because 243203232121 - 2¹ = 243203232119 is a prime.

It is a super-2 number, since 2×243203232121² (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 (243203232101) 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, 39185301 + ... + 39191506.

It is an arithmetic number, because the mean of its divisors is an integer number (31742607240).

Almost surely, 2^243203232121 is an apocalyptic number.

It is an amenable number.

243203232121 is a deficient number, since it is larger than the sum of its proper divisors (10737625799).

243203232121 is a wasteful number, since it uses less digits than its factorization.

243203232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78376943.

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

Adding to 243203232121 its reverse (121232302342), we get a palindrome (364435534463).

The spelling of 243203232121 in words is "two hundred forty-three billion, two hundred three million, two hundred thirty-two thousand, one hundred twenty-one".