11103211321 has 2 divisors, whose sum is σ = 11103211322. Its totient is φ = 11103211320.

The previous prime is 11103211313. The next prime is 11103211367. The reversal of 11103211321 is 12311230111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10938858921 + 164352400 = 104589^2 + 12820^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103211321 - 2³ = 11103211313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11103211295 and 11103211304.

It is not a weakly prime, because it can be changed into another prime (11103214321) 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 as a sum of consecutive naturals, namely, 5551605660 + 5551605661.

It is an arithmetic number, because the mean of its divisors is an integer number (5551605661).

Almost surely, 2^11103211321 is an apocalyptic number.

It is an amenable number.

11103211321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103211321 is an equidigital number, since it uses as much as digits as its factorization.

11103211321 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11103211321 its reverse (12311230111), we get a palindrome (23414441432).

The spelling of 11103211321 in words is "eleven billion, one hundred three million, two hundred eleven thousand, three hundred twenty-one".