11103142321 has 2 divisors, whose sum is σ = 11103142322. Its totient is φ = 11103142320.

The previous prime is 11103142261. The next prime is 11103142367. The reversal of 11103142321 is 12324130111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10007201296 + 1095941025 = 100036^2 + 33105^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103142321 - 2²⁵ = 11069587889 is a prime.

It is not a weakly prime, because it can be changed into another prime (11103142021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551571160 + 5551571161.

It is an arithmetic number, because the mean of its divisors is an integer number (5551571161).

Almost surely, 2^11103142321 is an apocalyptic number.

It is an amenable number.

11103142321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103142321 is an equidigital number, since it uses as much as digits as its factorization.

11103142321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11103142321 its reverse (12324130111), we get a palindrome (23427272432).

The spelling of 11103142321 in words is "eleven billion, one hundred three million, one hundred forty-two thousand, three hundred twenty-one".