21321301300331 has 4 divisors (see below), whose sum is σ = 22443475053000. Its totient is φ = 20199127547664.

The previous prime is 21321301300307. The next prime is 21321301300337. The reversal of 21321301300331 is 13300310312312.

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 21321301300331 - 2¹⁸ = 21321301038187 is a prime.

It is a super-2 number, since 2×21321301300331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321301300297 and 21321301300306.

It is not an unprimeable number, because it can be changed into a prime (21321301300337) 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, 561086876306 + ... + 561086876343.

It is an arithmetic number, because the mean of its divisors is an integer number (5610868763250).

Almost surely, 2^{21321301300331} is an apocalyptic number.

21321301300331 is a deficient number, since it is larger than the sum of its proper divisors (1122173752669).

21321301300331 is a wasteful number, since it uses less digits than its factorization.

21321301300331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122173752668.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21321301300331 its reverse (13300310312312), we get a palindrome (34621611612643).

The spelling of 21321301300331 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred one million, three hundred thousand, three hundred thirty-one".