11001131321 has 4 divisors (see below), whose sum is σ = 11002051200. Its totient is φ = 11000211444.

The previous prime is 11001131303. The next prime is 11001131329. The reversal of 11001131321 is 12313110011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11001131321 - 2⁶ = 11001131257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001131296 and 11001131305.

It is not an unprimeable number, because it can be changed into a prime (11001131329) 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, 441761 + ... + 465998.

It is an arithmetic number, because the mean of its divisors is an integer number (2750512800).

Almost surely, 2^11001131321 is an apocalyptic number.

It is an amenable number.

11001131321 is a deficient number, since it is larger than the sum of its proper divisors (919879).

11001131321 is an equidigital number, since it uses as much as digits as its factorization.

11001131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919878.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11001131321 its reverse (12313110011), we get a palindrome (23314241332).

The spelling of 11001131321 in words is "eleven billion, one million, one hundred thirty-one thousand, three hundred twenty-one".