243121003023 has 4 divisors (see below), whose sum is σ = 324161337368. Its totient is φ = 162080668680.

The previous prime is 243121002991. The next prime is 243121003033. The reversal of 243121003023 is 320300121342.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 243121003023 - 2⁵ = 243121002991 is a prime.

It is a super-2 number, since 2×243121003023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121003033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40520167168 + ... + 40520167173.

It is an arithmetic number, because the mean of its divisors is an integer number (81040334342).

Almost surely, 2^243121003023 is an apocalyptic number.

243121003023 is a deficient number, since it is larger than the sum of its proper divisors (81040334345).

243121003023 is an equidigital number, since it uses as much as digits as its factorization.

243121003023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81040334344.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 243121003023 its reverse (320300121342), we get a palindrome (563421124365).

The spelling of 243121003023 in words is "two hundred forty-three billion, one hundred twenty-one million, three thousand, twenty-three".