100104042021 has 4 divisors (see below), whose sum is σ = 133472056032. Its totient is φ = 66736028012.

The previous prime is 100104041971. The next prime is 100104042047. The reversal of 100104042021 is 120240401001.

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 100104042021 - 2⁶ = 100104041957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100104042221) 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, 16684007001 + ... + 16684007006.

It is an arithmetic number, because the mean of its divisors is an integer number (33368014008).

Almost surely, 2^100104042021 is an apocalyptic number.

It is an amenable number.

100104042021 is a deficient number, since it is larger than the sum of its proper divisors (33368014011).

100104042021 is an equidigital number, since it uses as much as digits as its factorization.

100104042021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33368014010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 100104042021 its reverse (120240401001), we get a palindrome (220344443022).

The spelling of 100104042021 in words is "one hundred billion, one hundred four million, forty-two thousand, twenty-one".