21311301301 has 4 divisors (see below), whose sum is σ = 21319200000. Its totient is φ = 21303402604.

The previous prime is 21311301299. The next prime is 21311301313. The reversal of 21311301301 is 10310311312.

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 21311301301 - 2¹ = 21311301299 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 (21311301001) 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, 3945301 + ... + 3950698.

It is an arithmetic number, because the mean of its divisors is an integer number (5329800000).

Almost surely, 2^21311301301 is an apocalyptic number.

It is an amenable number.

21311301301 is a deficient number, since it is larger than the sum of its proper divisors (7898699).

21311301301 is an equidigital number, since it uses as much as digits as its factorization.

21311301301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7898698.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21311301301 its reverse (10310311312), we get a palindrome (31621612613).

The spelling of 21311301301 in words is "twenty-one billion, three hundred eleven million, three hundred one thousand, three hundred one".