20113003221 has 4 divisors (see below), whose sum is σ = 26817337632. Its totient is φ = 13408668812.

The previous prime is 20113003219. The next prime is 20113003243. The reversal of 20113003221 is 12230031102.

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 20113003221 - 2¹ = 20113003219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20113003221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113003121) 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, 3352167201 + ... + 3352167206.

It is an arithmetic number, because the mean of its divisors is an integer number (6704334408).

Almost surely, 2^20113003221 is an apocalyptic number.

It is an amenable number.

20113003221 is a deficient number, since it is larger than the sum of its proper divisors (6704334411).

20113003221 is an equidigital number, since it uses as much as digits as its factorization.

20113003221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704334410.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20113003221 its reverse (12230031102), we get a palindrome (32343034323).

The spelling of 20113003221 in words is "twenty billion, one hundred thirteen million, three thousand, two hundred twenty-one".