21302321131 has 16 divisors (see below), whose sum is σ = 26827972864. Its totient is φ = 16462613664.

The previous prime is 21302321129. The next prime is 21302321213. The reversal of 21302321131 is 13112320312.

It is not a de Polignac number, because 21302321131 - 2¹ = 21302321129 is a prime.

It is a super-2 number, since 2×21302321131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21302321099 and 21302321108.

It is not an unprimeable number, because it can be changed into a prime (21302321101) 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, 2718081 + ... + 2725906.

It is an arithmetic number, because the mean of its divisors is an integer number (1676748304).

Almost surely, 2^21302321131 is an apocalyptic number.

21302321131 is a deficient number, since it is larger than the sum of its proper divisors (5525651733).

21302321131 is a wasteful number, since it uses less digits than its factorization.

21302321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444050.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21302321131 its reverse (13112320312), we get a palindrome (34414641443).

The spelling of 21302321131 in words is "twenty-one billion, three hundred two million, three hundred twenty-one thousand, one hundred thirty-one".