21131311303 has 8 divisors (see below), whose sum is σ = 21867893280. Its totient is φ = 20395257120.

The previous prime is 21131311297. The next prime is 21131311319. The reversal of 21131311303 is 30311313112.

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 21131311303 - 2²¹ = 21129214151 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 (21131311373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49600 + ... + 211477.

It is an arithmetic number, because the mean of its divisors is an integer number (2733486660).

Almost surely, 2^21131311303 is an apocalyptic number.

21131311303 is a deficient number, since it is larger than the sum of its proper divisors (736581977).

21131311303 is a wasteful number, since it uses less digits than its factorization.

21131311303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263897.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21131311303 its reverse (30311313112), we get a palindrome (51442624415).

The spelling of 21131311303 in words is "twenty-one billion, one hundred thirty-one million, three hundred eleven thousand, three hundred three".