21031332303121 has 24 divisors (see below), whose sum is σ = 24708410251200. Its totient is φ = 17848293573600.

The previous prime is 21031332303067. The next prime is 21031332303131. The reversal of 21031332303121 is 12130323313012.

It is a de Polignac number, because none of the positive numbers 2^k-21031332303121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21031332303131) 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 23 ways as a sum of consecutive naturals, for example, 2360595 + ... + 6901816.

It is an arithmetic number, because the mean of its divisors is an integer number (1029517093800).

Almost surely, 2^{21031332303121} is an apocalyptic number.

It is an amenable number.

21031332303121 is a deficient number, since it is larger than the sum of its proper divisors (3677077948079).

21031332303121 is a wasteful number, since it uses less digits than its factorization.

21031332303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9262885 (or 9262878 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21031332303121 its reverse (12130323313012), we get a palindrome (33161655616133).

The spelling of 21031332303121 in words is "twenty-one trillion, thirty-one billion, three hundred thirty-two million, three hundred three thousand, one hundred twenty-one".