21200321311 has 8 divisors (see below), whose sum is σ = 23205396704. Its totient is φ = 19248714720.

The previous prime is 21200321299. The next prime is 21200321357. The reversal of 21200321311 is 11312300212.

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 21200321311 - 2¹⁹ = 21199797023 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 (21200321371) 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, 13366371 + ... + 13367956.

It is an arithmetic number, because the mean of its divisors is an integer number (2900674588).

Almost surely, 2^21200321311 is an apocalyptic number.

21200321311 is a deficient number, since it is larger than the sum of its proper divisors (2005075393).

21200321311 is a wasteful number, since it uses less digits than its factorization.

21200321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26734401.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21200321311 its reverse (11312300212), we get a palindrome (32512621523).

The spelling of 21200321311 in words is "twenty-one billion, two hundred million, three hundred twenty-one thousand, three hundred eleven".