11031020111 has 16 divisors (see below), whose sum is σ = 11420529120. Its totient is φ = 10647598080.

The previous prime is 11031020107. The next prime is 11031020159. The reversal of 11031020111 is 11102013011.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11031020111 - 2² = 11031020107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11031020092 and 11031020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031020311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3051341 + ... + 3054953.

It is an arithmetic number, because the mean of its divisors is an integer number (713783070).

Almost surely, 2^11031020111 is an apocalyptic number.

11031020111 is a deficient number, since it is larger than the sum of its proper divisors (389509009).

11031020111 is a wasteful number, since it uses less digits than its factorization.

11031020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 11031020111 its reverse (11102013011), we get a palindrome (22133033122).

The spelling of 11031020111 in words is "eleven billion, thirty-one million, twenty thousand, one hundred eleven".