21131431212303 has 12 divisors (see below), whose sum is σ = 30650890464480. Its totient is φ = 14028676786656.

The previous prime is 21131431212289. The next prime is 21131431212319. The reversal of 21131431212303 is 30321213413112.

21131431212303 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 143 + 1 + 212 + 303 = 666.

It is not a de Polignac number, because 21131431212303 - 2³⁰ = 21130357470479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131431212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4911999526 + ... + 4912003827.

It is an arithmetic number, because the mean of its divisors is an integer number (2554240872040).

Almost surely, 2^{21131431212303} is an apocalyptic number.

21131431212303 is a deficient number, since it is larger than the sum of its proper divisors (9519459252177).

21131431212303 is a wasteful number, since it uses less digits than its factorization.

21131431212303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9824003598 (or 9824003595 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 21131431212303 its reverse (30321213413112), we get a palindrome (51452644625415).

The spelling of 21131431212303 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred thirty-one million, two hundred twelve thousand, three hundred three".