11031144021 has 6 divisors (see below), whose sum is σ = 15933874710. Its totient is φ = 7354096008.

The previous prime is 11031144017. The next prime is 11031144023. The reversal of 11031144021 is 12044113011.

It can be written as a sum of positive squares in only one way, i.e., 8229029796 + 2802114225 = 90714^2 + 52935^2 .

It is not a de Polignac number, because 11031144021 - 2² = 11031144017 is a prime.

It is a super-2 number, since 2×11031144021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11031143985 and 11031144003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031144023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 612841326 + ... + 612841343.

It is an arithmetic number, because the mean of its divisors is an integer number (2655645785).

Almost surely, 2^11031144021 is an apocalyptic number.

It is an amenable number.

11031144021 is a deficient number, since it is larger than the sum of its proper divisors (4902730689).

11031144021 is a wasteful number, since it uses less digits than its factorization.

11031144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225682675 (or 1225682672 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11031144021 its reverse (12044113011), we get a palindrome (23075257032).

The spelling of 11031144021 in words is "eleven billion, thirty-one million, one hundred forty-four thousand, twenty-one".