100404112021 has 4 divisors (see below), whose sum is σ = 102852992844. Its totient is φ = 97955231200.

The previous prime is 100404112001. The next prime is 100404112027. The reversal of 100404112021 is 120211404001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1437243921 + 98966868100 = 37911^2 + 314590^2 .

It is a cyclic number.

It is not a de Polignac number, because 100404112021 - 2²⁷ = 100269894293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100404111986 and 100404112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100404112027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224440350 + ... + 1224440431.

It is an arithmetic number, because the mean of its divisors is an integer number (25713248211).

Almost surely, 2^100404112021 is an apocalyptic number.

It is an amenable number.

100404112021 is a deficient number, since it is larger than the sum of its proper divisors (2448880823).

100404112021 is an equidigital number, since it uses as much as digits as its factorization.

100404112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448880822.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100404112021 its reverse (120211404001), we get a palindrome (220615516022).

The spelling of 100404112021 in words is "one hundred billion, four hundred four million, one hundred twelve thousand, twenty-one".