240434242123 has 4 divisors (see below), whose sum is σ = 250887904848. Its totient is φ = 229980579400.

The previous prime is 240434242109. The next prime is 240434242141. The reversal of 240434242123 is 321242434042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321242434042 = 2 ⋅160621217021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240434242123 is a prime.

It is a super-2 number, since 2×240434242123² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (240434242163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5226831328 + ... + 5226831373.

It is an arithmetic number, because the mean of its divisors is an integer number (62721976212).

Almost surely, 2^240434242123 is an apocalyptic number.

240434242123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

240434242123 is a deficient number, since it is larger than the sum of its proper divisors (10453662725).

240434242123 is a wasteful number, since it uses less digits than its factorization.

240434242123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453662724.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 240434242123 its reverse (321242434042), we get a palindrome (561676676165).

The spelling of 240434242123 in words is "two hundred forty billion, four hundred thirty-four million, two hundred forty-two thousand, one hundred twenty-three".