243121355401 has 8 divisors (see below), whose sum is σ = 248901408000. Its totient is φ = 237396614640.

The previous prime is 243121355359. The next prime is 243121355419. The reversal of 243121355401 is 104553121342.

243121355401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 243121355401 - 2¹⁹ = 243120831113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121355441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13819065 + ... + 13836646.

It is an arithmetic number, because the mean of its divisors is an integer number (31112676000).

Almost surely, 2^243121355401 is an apocalyptic number.

It is an amenable number.

243121355401 is a deficient number, since it is larger than the sum of its proper divisors (5780052599).

243121355401 is a wasteful number, since it uses less digits than its factorization.

243121355401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27655919.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 243121355401 its reverse (104553121342), we get a palindrome (347674476743).

The spelling of 243121355401 in words is "two hundred forty-three billion, one hundred twenty-one million, three hundred fifty-five thousand, four hundred one".