20331121003 has 4 divisors (see below), whose sum is σ = 20986963648. Its totient is φ = 19675278360.

The previous prime is 20331121001. The next prime is 20331121043. The reversal of 20331121003 is 30012113302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30012113302 = 2 ⋅15006056651.

It is a cyclic number.

It is not a de Polignac number, because 20331121003 - 2¹ = 20331121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327921276 + ... + 327921337.

It is an arithmetic number, because the mean of its divisors is an integer number (5246740912).

Almost surely, 2^20331121003 is an apocalyptic number.

20331121003 is a deficient number, since it is larger than the sum of its proper divisors (655842645).

20331121003 is an equidigital number, since it uses as much as digits as its factorization.

20331121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655842644.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20331121003 its reverse (30012113302), we get a palindrome (50343234305).

The spelling of 20331121003 in words is "twenty billion, three hundred thirty-one million, one hundred twenty-one thousand, three".