231243121043 has 64 divisors (see below), whose sum is σ = 276977885184. Its totient is φ = 190883616000.

The previous prime is 231243121037. The next prime is 231243121049. The reversal of 231243121043 is 340121342132.

It is an interprime number because it is at equal distance from previous prime (231243121037) and next prime (231243121049).

It is not a de Polignac number, because 231243121043 - 2¹⁰ = 231243120019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231243121049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138717296 + ... + 138718962.

It is an arithmetic number, because the mean of its divisors is an integer number (4327779456).

Almost surely, 2^231243121043 is an apocalyptic number.

231243121043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

231243121043 is a deficient number, since it is larger than the sum of its proper divisors (45734764141).

231243121043 is a wasteful number, since it uses less digits than its factorization.

231243121043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 231243121043 its reverse (340121342132), we get a palindrome (571364463175).

Subtracting 231243121043 from its reverse (340121342132), we obtain a square (108878221089 = 329967²).

The spelling of 231243121043 in words is "two hundred thirty-one billion, two hundred forty-three million, one hundred twenty-one thousand, forty-three".