100042434321 has 4 divisors (see below), whose sum is σ = 133389912432. Its totient is φ = 66694956212.

The previous prime is 100042434313. The next prime is 100042434347. The reversal of 100042434321 is 123434240001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100042434321 - 2³ = 100042434313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100042434291 and 100042434300.

It is not an unprimeable number, because it can be changed into a prime (100042436321) 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, 16673739051 + ... + 16673739056.

It is an arithmetic number, because the mean of its divisors is an integer number (33347478108).

Almost surely, 2^100042434321 is an apocalyptic number.

It is an amenable number.

100042434321 is a deficient number, since it is larger than the sum of its proper divisors (33347478111).

100042434321 is an equidigital number, since it uses as much as digits as its factorization.

100042434321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33347478110.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 100042434321 its reverse (123434240001), we get a palindrome (223476674322).

The spelling of 100042434321 in words is "one hundred billion, forty-two million, four hundred thirty-four thousand, three hundred twenty-one".