21312001320211 has 8 divisors (see below), whose sum is σ = 25789312522080. Its totient is φ = 17192875014528.

The previous prime is 21312001320187. The next prime is 21312001320289. The reversal of 21312001320211 is 11202310021312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21312001320211 - 2¹¹ = 21312001318163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312001320011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89546223916 + ... + 89546224153.

It is an arithmetic number, because the mean of its divisors is an integer number (3223664065260).

Almost surely, 2^{21312001320211} is an apocalyptic number.

21312001320211 is a deficient number, since it is larger than the sum of its proper divisors (4477311201869).

21312001320211 is a wasteful number, since it uses less digits than its factorization.

21312001320211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179092448093.

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

Adding to 21312001320211 its reverse (11202310021312), we get a palindrome (32514311341523).

The spelling of 21312001320211 in words is "twenty-one trillion, three hundred twelve billion, one million, three hundred twenty thousand, two hundred eleven".