20112304321 has 2 divisors, whose sum is σ = 20112304322. Its totient is φ = 20112304320.

The previous prime is 20112304319. The next prime is 20112304357. The reversal of 20112304321 is 12340321102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12670654096 + 7441650225 = 112564^2 + 86265^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112304321 - 2¹ = 20112304319 is a prime.

Together with 20112304319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20112304021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056152160 + 10056152161.

It is an arithmetic number, because the mean of its divisors is an integer number (10056152161).

Almost surely, 2^20112304321 is an apocalyptic number.

It is an amenable number.

20112304321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112304321 is an equidigital number, since it uses as much as digits as its factorization.

20112304321 is an evil number, because the sum of its binary digits is even.

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

Adding to 20112304321 its reverse (12340321102), we get a palindrome (32452625423).

The spelling of 20112304321 in words is "twenty billion, one hundred twelve million, three hundred four thousand, three hundred twenty-one".