20030231033221 has 4 divisors (see below), whose sum is σ = 21084453719200. Its totient is φ = 18976008347244.

The previous prime is 20030231033177. The next prime is 20030231033257. The reversal of 20030231033221 is 12233013203002.

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 20030231033221 - 2¹³ = 20030231025029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20030231033192 and 20030231033201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030231033261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527111342961 + ... + 527111342998.

It is an arithmetic number, because the mean of its divisors is an integer number (5271113429800).

Almost surely, 2^{20030231033221} is an apocalyptic number.

It is an amenable number.

20030231033221 is a deficient number, since it is larger than the sum of its proper divisors (1054222685979).

20030231033221 is a wasteful number, since it uses less digits than its factorization.

20030231033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054222685978.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20030231033221 its reverse (12233013203002), we get a palindrome (32263244236223).

The spelling of 20030231033221 in words is "twenty trillion, thirty billion, two hundred thirty-one million, thirty-three thousand, two hundred twenty-one".