21130314343 has 4 divisors (see below), whose sum is σ = 21154409080. Its totient is φ = 21106219608.

The previous prime is 21130314329. The next prime is 21130314367. The reversal of 21130314343 is 34341303112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21130314343 - 2³³ = 12540379751 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 (21130314313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12046053 + ... + 12047806.

It is an arithmetic number, because the mean of its divisors is an integer number (5288602270).

Almost surely, 2^21130314343 is an apocalyptic number.

21130314343 is a deficient number, since it is larger than the sum of its proper divisors (24094737).

21130314343 is an equidigital number, since it uses as much as digits as its factorization.

21130314343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24094736.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21130314343 its reverse (34341303112), we get a palindrome (55471617455).

The spelling of 21130314343 in words is "twenty-one billion, one hundred thirty million, three hundred fourteen thousand, three hundred forty-three".