20212343321 has 4 divisors (see below), whose sum is σ = 20212659252. Its totient is φ = 20212027392.

The previous prime is 20212343293. The next prime is 20212343323. The reversal of 20212343321 is 12334321202.

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 6599287696 + 13613055625 = 81236^2 + 116675^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212343321 - 2⁶ = 20212343257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212343323) 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, 24296 + ... + 202521.

It is an arithmetic number, because the mean of its divisors is an integer number (5053164813).

Almost surely, 2^20212343321 is an apocalyptic number.

It is an amenable number.

20212343321 is a deficient number, since it is larger than the sum of its proper divisors (315931).

20212343321 is an equidigital number, since it uses as much as digits as its factorization.

20212343321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315930.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20212343321 its reverse (12334321202), we get a palindrome (32546664523).

The spelling of 20212343321 in words is "twenty billion, two hundred twelve million, three hundred forty-three thousand, three hundred twenty-one".