21312203201311 has 8 divisors (see below), whose sum is σ = 23335468386048. Its totient is φ = 19303236711000.

The previous prime is 21312203201279. The next prime is 21312203201347. The reversal of 21312203201311 is 11310230221312.

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

It is not a de Polignac number, because 21312203201311 - 2⁵ = 21312203201279 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 (21312203201371) 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, 3574670485 + ... + 3574676446.

It is an arithmetic number, because the mean of its divisors is an integer number (2916933548256).

Almost surely, 2^{21312203201311} is an apocalyptic number.

21312203201311 is a deficient number, since it is larger than the sum of its proper divisors (2023265184737).

21312203201311 is a wasteful number, since it uses less digits than its factorization.

21312203201311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7149347213.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21312203201311 its reverse (11310230221312), we get a palindrome (32622433422623).

The spelling of 21312203201311 in words is "twenty-one trillion, three hundred twelve billion, two hundred three million, two hundred one thousand, three hundred eleven".