21231231003303 has 16 divisors (see below), whose sum is σ = 29395804331520. Its totient is φ = 13614117431264.

The previous prime is 21231231003247. The next prime is 21231231003347. The reversal of 21231231003303 is 30330013213212.

It is not a de Polignac number, because 21231231003303 - 2¹⁰ = 21231231002279 is a prime.

It is a super-2 number, since 2×21231231003303² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231231053303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463926051 + ... + 463971812.

It is an arithmetic number, because the mean of its divisors is an integer number (1837237770720).

Almost surely, 2^{21231231003303} is an apocalyptic number.

21231231003303 is a deficient number, since it is larger than the sum of its proper divisors (8164573328217).

21231231003303 is a wasteful number, since it uses less digits than its factorization.

21231231003303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927898158.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21231231003303 its reverse (30330013213212), we get a palindrome (51561244216515).

The spelling of 21231231003303 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred thirty-one million, three thousand, three hundred three".