11011231321 has 16 divisors (see below), whose sum is σ = 11332778688. Its totient is φ = 10692864000.

The previous prime is 11011231277. The next prime is 11011231327. The reversal of 11011231321 is 12313211011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11011231321 - 2¹⁵ = 11011198553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011231295 and 11011231304.

It is not an unprimeable number, because it can be changed into a prime (11011231327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6876921 + ... + 6878521.

It is an arithmetic number, because the mean of its divisors is an integer number (708298668).

Almost surely, 2^11011231321 is an apocalyptic number.

It is an amenable number.

11011231321 is a deficient number, since it is larger than the sum of its proper divisors (321547367).

11011231321 is a wasteful number, since it uses less digits than its factorization.

11011231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11011231321 its reverse (12313211011), we get a palindrome (23324442332).

The spelling of 11011231321 in words is "eleven billion, eleven million, two hundred thirty-one thousand, three hundred twenty-one".