20213000221321 has 4 divisors (see below), whose sum is σ = 20213164772500. Its totient is φ = 20212835670144.

The previous prime is 20213000221319. The next prime is 20213000221361. The reversal of 20213000221321 is 12312200031202.

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 884843116921 + 19328157104400 = 940661^2 + 4396380^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213000221321 - 2¹ = 20213000221319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213000221361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82091196 + ... + 82337053.

It is an arithmetic number, because the mean of its divisors is an integer number (5053291193125).

Almost surely, 2^{20213000221321} is an apocalyptic number.

It is an amenable number.

20213000221321 is a deficient number, since it is larger than the sum of its proper divisors (164551179).

20213000221321 is a wasteful number, since it uses less digits than its factorization.

20213000221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164551178.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20213000221321 its reverse (12312200031202), we get a palindrome (32525200252523).

The spelling of 20213000221321 in words is "twenty trillion, two hundred thirteen billion, two hundred twenty-one thousand, three hundred twenty-one".