21300312441 has 4 divisors (see below), whose sum is σ = 28400416592. Its totient is φ = 14200208292.

The previous prime is 21300312419. The next prime is 21300312479. The reversal of 21300312441 is 14421300312.

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 not a de Polignac number, because 21300312441 - 2¹¹ = 21300310393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21300312541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3550052071 + ... + 3550052076.

It is an arithmetic number, because the mean of its divisors is an integer number (7100104148).

Almost surely, 2^21300312441 is an apocalyptic number.

It is an amenable number.

21300312441 is a deficient number, since it is larger than the sum of its proper divisors (7100104151).

21300312441 is an equidigital number, since it uses as much as digits as its factorization.

21300312441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100104150.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21300312441 its reverse (14421300312), we get a palindrome (35721612753).

The spelling of 21300312441 in words is "twenty-one billion, three hundred million, three hundred twelve thousand, four hundred forty-one".