11321320311231 has 128 divisors (see below), whose sum is σ = 18501824839680. Its totient is φ = 6014610505728.

The previous prime is 11321320311061. The next prime is 11321320311233. The reversal of 11321320311231 is 13211302312311.

It is not a de Polignac number, because 11321320311231 - 2¹¹ = 11321320309183 is a prime.

It is a super-2 number, since 2×11321320311231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321320311233) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2422706911 + ... + 2422711583.

It is an arithmetic number, because the mean of its divisors is an integer number (144545506560).

Almost surely, 2^{11321320311231} is an apocalyptic number.

11321320311231 is a deficient number, since it is larger than the sum of its proper divisors (7180504528449).

11321320311231 is a wasteful number, since it uses less digits than its factorization.

11321320311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5325.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 11321320311231 its reverse (13211302312311), we get a palindrome (24532622623542).

The spelling of 11321320311231 in words is "eleven trillion, three hundred twenty-one billion, three hundred twenty million, three hundred eleven thousand, two hundred thirty-one".