21321101312311 has 4 divisors (see below), whose sum is σ = 21321145028800. Its totient is φ = 21321057595824.

The previous prime is 21321101312219. The next prime is 21321101312321. The reversal of 21321101312311 is 11321310112312.

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 21321101312311 - 2³³ = 21312511377719 is a prime.

It is a super-2 number, since 2×21321101312311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321101312321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21118326 + ... + 22104883.

It is an arithmetic number, because the mean of its divisors is an integer number (5330286257200).

Almost surely, 2^{21321101312311} is an apocalyptic number.

21321101312311 is a deficient number, since it is larger than the sum of its proper divisors (43716489).

21321101312311 is an equidigital number, since it uses as much as digits as its factorization.

21321101312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43716488.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21321101312311 its reverse (11321310112312), we get a palindrome (32642411424623).

The spelling of 21321101312311 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred one million, three hundred twelve thousand, three hundred eleven".