21231311120311 has 8 divisors (see below), whose sum is σ = 21917319716864. Its totient is φ = 20545372998360.

The previous prime is 21231311120251. The next prime is 21231311120347. The reversal of 21231311120311 is 11302111313212.

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 21231311120311 - 2⁷ = 21231311120183 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 (21231311120911) 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, 17006055 + ... + 18211768.

It is an arithmetic number, because the mean of its divisors is an integer number (2739664964608).

Almost surely, 2^{21231311120311} is an apocalyptic number.

21231311120311 is a deficient number, since it is larger than the sum of its proper divisors (686008596553).

21231311120311 is a wasteful number, since it uses less digits than its factorization.

21231311120311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35237301.

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

Adding to 21231311120311 its reverse (11302111313212), we get a palindrome (32533422433523).

The spelling of 21231311120311 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred eleven million, one hundred twenty thousand, three hundred eleven".