21130134313 has 4 divisors (see below), whose sum is σ = 21445509520. Its totient is φ = 20814759108.

The previous prime is 21130134301. The next prime is 21130134317. The reversal of 21130134313 is 31343103112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21130134313 - 2⁵ = 21130134281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130134317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157687503 + ... + 157687636.

It is an arithmetic number, because the mean of its divisors is an integer number (5361377380).

Almost surely, 2^21130134313 is an apocalyptic number.

It is an amenable number.

21130134313 is a deficient number, since it is larger than the sum of its proper divisors (315375207).

21130134313 is an equidigital number, since it uses as much as digits as its factorization.

21130134313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315375206.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21130134313 its reverse (31343103112), we get a palindrome (52473237425).

The spelling of 21130134313 in words is "twenty-one billion, one hundred thirty million, one hundred thirty-four thousand, three hundred thirteen".