20003130223121 has 4 divisors (see below), whose sum is σ = 20004703674852. Its totient is φ = 20001556771392.

The previous prime is 20003130223093. The next prime is 20003130223129. The reversal of 20003130223121 is 12132203130002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11811147460225 + 8191982762896 = 3436735^2 + 2862164^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003130223121 - 2¹⁸ = 20003129960977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20003130223093 and 20003130223102.

It is not an unprimeable number, because it can be changed into a prime (20003130223129) 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, 786706796 + ... + 786732221.

It is an arithmetic number, because the mean of its divisors is an integer number (5001175918713).

Almost surely, 2^{20003130223121} is an apocalyptic number.

It is an amenable number.

20003130223121 is a deficient number, since it is larger than the sum of its proper divisors (1573451731).

20003130223121 is a wasteful number, since it uses less digits than its factorization.

20003130223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573451730.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20003130223121 its reverse (12132203130002), we get a palindrome (32135333353123).

The spelling of 20003130223121 in words is "twenty trillion, three billion, one hundred thirty million, two hundred twenty-three thousand, one hundred twenty-one".