20301042221 has 4 divisors (see below), whose sum is σ = 20301372000. Its totient is φ = 20300712444.

The previous prime is 20301042187. The next prime is 20301042239. The reversal of 20301042221 is 12224010302.

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 20301042221 - 2¹⁴ = 20301025837 is a prime.

It is a super-2 number, since 2×20301042221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20301042221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20301044221) 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, 42041 + ... + 205838.

It is an arithmetic number, because the mean of its divisors is an integer number (5075343000).

Almost surely, 2^20301042221 is an apocalyptic number.

It is an amenable number.

20301042221 is a deficient number, since it is larger than the sum of its proper divisors (329779).

20301042221 is an equidigital number, since it uses as much as digits as its factorization.

20301042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329778.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20301042221 its reverse (12224010302), we get a palindrome (32525052523).

The spelling of 20301042221 in words is "twenty billion, three hundred one million, forty-two thousand, two hundred twenty-one".