11031311121 has 4 divisors (see below), whose sum is σ = 14708414832. Its totient is φ = 7354207412.

The previous prime is 11031311119. The next prime is 11031311171. The reversal of 11031311121 is 12111313011.

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 11031311121 - 2¹ = 11031311119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11031311121.

It is not an unprimeable number, because it can be changed into a prime (11031311111) 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 3 ways as a sum of consecutive naturals, for example, 1838551851 + ... + 1838551856.

It is an arithmetic number, because the mean of its divisors is an integer number (3677103708).

Almost surely, 2^11031311121 is an apocalyptic number.

It is an amenable number.

11031311121 is a deficient number, since it is larger than the sum of its proper divisors (3677103711).

11031311121 is an equidigital number, since it uses as much as digits as its factorization.

11031311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677103710.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 11031311121 its reverse (12111313011), we get a palindrome (23142624132).

The spelling of 11031311121 in words is "eleven billion, thirty-one million, three hundred eleven thousand, one hundred twenty-one".