11031121305 has 12 divisors (see below), whose sum is σ = 19120610340. Its totient is φ = 5883264672.

The previous prime is 11031121261. The next prime is 11031121337. The reversal of 11031121305 is 50312113011.

It can be written as a sum of positive squares in 2 ways, for example, as 4103555481 + 6927565824 = 64059^2 + 83232^2 .

It is not a de Polignac number, because 11031121305 - 2¹⁰ = 11031120281 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122567970 + ... + 122568059.

It is an arithmetic number, because the mean of its divisors is an integer number (1593384195).

Almost surely, 2^11031121305 is an apocalyptic number.

11031121305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11031121305 is a deficient number, since it is larger than the sum of its proper divisors (8089489035).

11031121305 is a wasteful number, since it uses less digits than its factorization.

11031121305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245136040 (or 245136037 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 11031121305 its reverse (50312113011), we get a palindrome (61343234316).

The spelling of 11031121305 in words is "eleven billion, thirty-one million, one hundred twenty-one thousand, three hundred five".