20300021221 has 8 divisors (see below), whose sum is σ = 20420577144. Its totient is φ = 20179642560.

The previous prime is 20300021207. The next prime is 20300021267. The reversal of 20300021221 is 12212000302.

It can be written as a sum of positive squares in 4 ways, for example, as 9898061121 + 10401960100 = 99489^2 + 101990^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20300021221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20300021281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189031 + ... + 276283.

It is an arithmetic number, because the mean of its divisors is an integer number (2552572143).

Almost surely, 2^20300021221 is an apocalyptic number.

It is an amenable number.

20300021221 is a deficient number, since it is larger than the sum of its proper divisors (120555923).

20300021221 is a wasteful number, since it uses less digits than its factorization.

20300021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88631.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20300021221 its reverse (12212000302), we get a palindrome (32512021523).

The spelling of 20300021221 in words is "twenty billion, three hundred million, twenty-one thousand, two hundred twenty-one".