11121031321 has 8 divisors (see below), whose sum is σ = 11891797704. Its totient is φ = 10363219200.

The previous prime is 11121031319. The next prime is 11121031349. The reversal of 11121031321 is 12313012111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2108187225 + 9012844096 = 45915^2 + 94936^2 .

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 11121031321 - 2¹ = 11121031319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121031295 and 11121031304.

It is not an unprimeable number, because it can be changed into a prime (11121031301) 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, 3236790 + ... + 3240223.

It is an arithmetic number, because the mean of its divisors is an integer number (1486474713).

Almost surely, 2^11121031321 is an apocalyptic number.

It is an amenable number.

11121031321 is a deficient number, since it is larger than the sum of its proper divisors (770766383).

11121031321 is a wasteful number, since it uses less digits than its factorization.

11121031321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6477131.

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

Adding to 11121031321 its reverse (12313012111), we get a palindrome (23434043432).

The spelling of 11121031321 in words is "eleven billion, one hundred twenty-one million, thirty-one thousand, three hundred twenty-one".