20003112321 has 4 divisors (see below), whose sum is σ = 26670816432. Its totient is φ = 13335408212.

The previous prime is 20003112313. The next prime is 20003112323. The reversal of 20003112321 is 12321130002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20003112321 - 2³ = 20003112313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20003112321.

It is not an unprimeable number, because it can be changed into a prime (20003112323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333852051 + ... + 3333852056.

It is an arithmetic number, because the mean of its divisors is an integer number (6667704108).

Almost surely, 2^20003112321 is an apocalyptic number.

It is an amenable number.

20003112321 is a deficient number, since it is larger than the sum of its proper divisors (6667704111).

20003112321 is an equidigital number, since it uses as much as digits as its factorization.

20003112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667704110.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20003112321 its reverse (12321130002), we get a palindrome (32324242323).

The spelling of 20003112321 in words is "twenty billion, three million, one hundred twelve thousand, three hundred twenty-one".