11321231203231 has 4 divisors (see below), whose sum is σ = 11396206244464. Its totient is φ = 11246256162000.

The previous prime is 11321231203223. The next prime is 11321231203297. The reversal of 11321231203231 is 13230213212311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11321231203231 - 2³ = 11321231203223 is a prime.

It is a super-2 number, since 2×11321231203231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11321231203196 and 11321231203205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321231209231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37487520390 + ... + 37487520691.

It is an arithmetic number, because the mean of its divisors is an integer number (2849051561116).

Almost surely, 2^{11321231203231} is an apocalyptic number.

11321231203231 is a deficient number, since it is larger than the sum of its proper divisors (74975041233).

11321231203231 is an equidigital number, since it uses as much as digits as its factorization.

11321231203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74975041232.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 11321231203231 its reverse (13230213212311), we get a palindrome (24551444415542).

The spelling of 11321231203231 in words is "eleven trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred three thousand, two hundred thirty-one".