21301012441 has 4 divisors (see below), whose sum is σ = 21362398992. Its totient is φ = 21239625892.

The previous prime is 21301012429. The next prime is 21301012463. The reversal of 21301012441 is 14421010312.

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 21301012441 - 2¹⁷ = 21300881369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301013441) 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, 30692755 + ... + 30693448.

It is an arithmetic number, because the mean of its divisors is an integer number (5340599748).

Almost surely, 2^21301012441 is an apocalyptic number.

It is an amenable number.

21301012441 is a deficient number, since it is larger than the sum of its proper divisors (61386551).

21301012441 is an equidigital number, since it uses as much as digits as its factorization.

21301012441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61386550.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21301012441 its reverse (14421010312), we get a palindrome (35722022753).

The spelling of 21301012441 in words is "twenty-one billion, three hundred one million, twelve thousand, four hundred forty-one".