21313312311 has 8 divisors (see below), whose sum is σ = 28418661760. Its totient is φ = 14208418872.

The previous prime is 21313312309. The next prime is 21313312331. The reversal of 21313312311 is 11321331312.

It is a happy number.

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

It is not a de Polignac number, because 21313312311 - 2¹ = 21313312309 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 (21313312331) 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, 16350 + ... + 207108.

It is an arithmetic number, because the mean of its divisors is an integer number (3552332720).

Almost surely, 2^21313312311 is an apocalyptic number.

21313312311 is a deficient number, since it is larger than the sum of its proper divisors (7105349449).

21313312311 is a wasteful number, since it uses less digits than its factorization.

21313312311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228005.

The product of its digits is 324, while the sum is 21.

Adding to 21313312311 its reverse (11321331312), we get a palindrome (32634643623).

The spelling of 21313312311 in words is "twenty-one billion, three hundred thirteen million, three hundred twelve thousand, three hundred eleven".