11321131220231 has 8 divisors (see below), whose sum is σ = 12968455256064. Its totient is φ = 9681312078360.

The previous prime is 11321131220227. The next prime is 11321131220323. The reversal of 11321131220231 is 13202213112311.

It is a happy number.

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 11321131220231 - 2² = 11321131220227 is a prime.

It is a super-2 number, since 2×11321131220231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11321131220197 and 11321131220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321131240231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876220255 + ... + 1876226288.

It is an arithmetic number, because the mean of its divisors is an integer number (1621056907008).

Almost surely, 2^{11321131220231} is an apocalyptic number.

11321131220231 is a deficient number, since it is larger than the sum of its proper divisors (1647324035833).

11321131220231 is an equidigital number, since it uses as much as digits as its factorization.

11321131220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752446981.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11321131220231 its reverse (13202213112311), we get a palindrome (24523344332542).

The spelling of 11321131220231 in words is "eleven trillion, three hundred twenty-one billion, one hundred thirty-one million, two hundred twenty thousand, two hundred thirty-one".