21311411311 has 8 divisors (see below), whose sum is σ = 22001616000. Its totient is φ = 20621377920.

The previous prime is 21311411309. The next prime is 21311411371. The reversal of 21311411311 is 11311411312.

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 21311411311 - 2¹ = 21311411309 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 (21311411371) 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, 239715 + ... + 316363.

It is an arithmetic number, because the mean of its divisors is an integer number (2750202000).

Almost surely, 2^21311411311 is an apocalyptic number.

21311411311 is a deficient number, since it is larger than the sum of its proper divisors (690204689).

21311411311 is an equidigital number, since it uses as much as digits as its factorization.

21311411311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85649.

The product of its digits is 72, while the sum is 19.

Adding to 21311411311 its reverse (11311411312), we get a palindrome (32622822623).

Subtracting from 21311411311 its reverse (11311411312), we obtain a palindrome (9999999999).

The spelling of 21311411311 in words is "twenty-one billion, three hundred eleven million, four hundred eleven thousand, three hundred eleven".