21210323132311 has 4 divisors (see below), whose sum is σ = 21220505718712. Its totient is φ = 21200140545912.

The previous prime is 21210323132291. The next prime is 21210323132377. The reversal of 21210323132311 is 11323132301212.

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 21210323132311 - 2²⁹ = 21209786261399 is a prime.

It is a super-2 number, since 2×21210323132311² (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 (21210323132711) 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, 5091290076 + ... + 5091294241.

It is an arithmetic number, because the mean of its divisors is an integer number (5305126429678).

Almost surely, 2^{21210323132311} is an apocalyptic number.

21210323132311 is a deficient number, since it is larger than the sum of its proper divisors (10182586401).

21210323132311 is a wasteful number, since it uses less digits than its factorization.

21210323132311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10182586400.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21210323132311 its reverse (11323132301212), we get a palindrome (32533455433523).

The spelling of 21210323132311 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-three million, one hundred thirty-two thousand, three hundred eleven".