21120431303 has 8 divisors (see below), whose sum is σ = 21620214528. Its totient is φ = 20621039544.

The previous prime is 21120431221. The next prime is 21120431327. The reversal of 21120431303 is 30313402112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21120431303 - 2²⁶ = 21053322439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120431333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12776 + ... + 205922.

It is an arithmetic number, because the mean of its divisors is an integer number (2702526816).

Almost surely, 2^21120431303 is an apocalyptic number.

21120431303 is a deficient number, since it is larger than the sum of its proper divisors (499783225).

21120431303 is a wasteful number, since it uses less digits than its factorization.

21120431303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195733.

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

Adding to 21120431303 its reverse (30313402112), we get a palindrome (51433833415).

The spelling of 21120431303 in words is "twenty-one billion, one hundred twenty million, four hundred thirty-one thousand, three hundred three".