20104221001 has 4 divisors (see below), whose sum is σ = 20531970432. Its totient is φ = 19676471572.

The previous prime is 20104220999. The next prime is 20104221047. The reversal of 20104221001 is 10012240102.

It is a happy number.

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 20104221001 - 2¹ = 20104220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20104221601) 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, 213874645 + ... + 213874738.

It is an arithmetic number, because the mean of its divisors is an integer number (5132992608).

Almost surely, 2^20104221001 is an apocalyptic number.

It is an amenable number.

20104221001 is a deficient number, since it is larger than the sum of its proper divisors (427749431).

20104221001 is an equidigital number, since it uses as much as digits as its factorization.

20104221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427749430.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20104221001 its reverse (10012240102), we get a palindrome (30116461103).

The spelling of 20104221001 in words is "twenty billion, one hundred four million, two hundred twenty-one thousand, one".