20031103021 has 4 divisors (see below), whose sum is σ = 20031451200. Its totient is φ = 20030754844.

The previous prime is 20031103019. The next prime is 20031103051. The reversal of 20031103021 is 12030113002.

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 20031103021 - 2¹ = 20031103019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20031102992 and 20031103010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031103051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65011 + ... + 210448.

It is an arithmetic number, because the mean of its divisors is an integer number (5007862800).

Almost surely, 2^20031103021 is an apocalyptic number.

It is an amenable number.

20031103021 is a deficient number, since it is larger than the sum of its proper divisors (348179).

20031103021 is an equidigital number, since it uses as much as digits as its factorization.

20031103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348178.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20031103021 its reverse (12030113002), we get a palindrome (32061216023).

The spelling of 20031103021 in words is "twenty billion, thirty-one million, one hundred three thousand, twenty-one".