21312302112001 has 4 divisors (see below), whose sum is σ = 21312313959600. Its totient is φ = 21312290264404.

The previous prime is 21312302111999. The next prime is 21312302112043. The reversal of 21312302112001 is 10021120321312.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21312302112001 - 2¹ = 21312302111999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21312302112001.

It is not an unprimeable number, because it can be changed into a prime (21312302172001) 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, 2606131 + ... + 7029688.

It is an arithmetic number, because the mean of its divisors is an integer number (5328078489900).

Almost surely, 2^{21312302112001} is an apocalyptic number.

It is an amenable number.

21312302112001 is a deficient number, since it is larger than the sum of its proper divisors (11847599).

21312302112001 is an equidigital number, since it uses as much as digits as its factorization.

21312302112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11847598.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21312302112001 its reverse (10021120321312), we get a palindrome (31333422433313).

The spelling of 21312302112001 in words is "twenty-one trillion, three hundred twelve billion, three hundred two million, one hundred twelve thousand, one".