100240043243 has 4 divisors (see below), whose sum is σ = 100258795560. Its totient is φ = 100221290928.

The previous prime is 100240043207. The next prime is 100240043249. The reversal of 100240043243 is 342340042001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342340042001 = 94837 ⋅3609773.

It is a cyclic number.

It is not a de Polignac number, because 100240043243 - 2²⁴ = 100223266027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100240043249) 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, 9368138 + ... + 9378831.

It is an arithmetic number, because the mean of its divisors is an integer number (25064698890).

Almost surely, 2^100240043243 is an apocalyptic number.

100240043243 is a deficient number, since it is larger than the sum of its proper divisors (18752317).

100240043243 is an equidigital number, since it uses as much as digits as its factorization.

100240043243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18752316.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 100240043243 its reverse (342340042001), we get a palindrome (442580085244).

The spelling of 100240043243 in words is "one hundred billion, two hundred forty million, forty-three thousand, two hundred forty-three".