11423131321 has 12 divisors (see below), whose sum is σ = 13456341120. Its totient is φ = 9667312200.

The previous prime is 11423131301. The next prime is 11423131361. The reversal of 11423131321 is 12313132411.

It is not a de Polignac number, because 11423131321 - 2¹⁵ = 11423098553 is a prime.

It is a super-2 number, since 2×11423131321² (a number of 21 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 = 11423131292 and 11423131301.

It is not an unprimeable number, because it can be changed into a prime (11423131301) 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 11 ways as a sum of consecutive naturals, for example, 1471605 + ... + 1479346.

It is an arithmetic number, because the mean of its divisors is an integer number (1121361760).

Almost surely, 2^11423131321 is an apocalyptic number.

It is an amenable number.

11423131321 is a deficient number, since it is larger than the sum of its proper divisors (2033209799).

11423131321 is an equidigital number, since it uses as much as digits as its factorization.

11423131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951044 (or 2951037 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 11423131321 its reverse (12313132411), we get a palindrome (23736263732).

The spelling of 11423131321 in words is "eleven billion, four hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty-one".