20313343243221 has 16 divisors (see below), whose sum is σ = 30953736658944. Its totient is φ = 11607598173744.

The previous prime is 20313343243217. The next prime is 20313343243241. The reversal of 20313343243221 is 12234234331302.

It is not a de Polignac number, because 20313343243221 - 2² = 20313343243217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313343243211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11804260 + ... + 13415186.

It is an arithmetic number, because the mean of its divisors is an integer number (1934608541184).

Almost surely, 2^{20313343243221} is an apocalyptic number.

20313343243221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20313343243221 is a deficient number, since it is larger than the sum of its proper divisors (10640393415723).

20313343243221 is a wasteful number, since it uses less digits than its factorization.

20313343243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211400.

The product of its (nonzero) digits is 62208, while the sum is 33.

Adding to 20313343243221 its reverse (12234234331302), we get a palindrome (32547577574523).

The spelling of 20313343243221 in words is "twenty trillion, three hundred thirteen billion, three hundred forty-three million, two hundred forty-three thousand, two hundred twenty-one".