21031431000303 has 16 divisors (see below), whose sum is σ = 28097060275296. Its totient is φ = 13993380410880.

The previous prime is 21031431000259. The next prime is 21031431000329. The reversal of 21031431000303 is 30300013413012.

It is not a de Polignac number, because 21031431000303 - 2¹⁰ = 21031430999279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21031431000303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031431001303) 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, 33911451 + ... + 34526067.

It is an arithmetic number, because the mean of its divisors is an integer number (1756066267206).

Almost surely, 2^{21031431000303} is an apocalyptic number.

21031431000303 is a deficient number, since it is larger than the sum of its proper divisors (7065629274993).

21031431000303 is a wasteful number, since it uses less digits than its factorization.

21031431000303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637034.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21031431000303 its reverse (30300013413012), we get a palindrome (51331444413315).

The spelling of 21031431000303 in words is "twenty-one trillion, thirty-one billion, four hundred thirty-one million, three hundred three", and thus it is an aban number.