11131035021 has 6 divisors (see below), whose sum is σ = 16078161710. Its totient is φ = 7420690008.

The previous prime is 11131035007. The next prime is 11131035029. The reversal of 11131035021 is 12053013111.

11131035021 is a `hidden beast` number, since 1 + 1 + 1 + 310 + 350 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8676922500 + 2454112521 = 93150^2 + 49539^2 .

It is not a de Polignac number, because 11131035021 - 2²² = 11126840717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11131034985 and 11131035003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131035029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 618390826 + ... + 618390843.

Almost surely, 2^11131035021 is an apocalyptic number.

It is an amenable number.

11131035021 is a deficient number, since it is larger than the sum of its proper divisors (4947126689).

11131035021 is a wasteful number, since it uses less digits than its factorization.

11131035021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236781675 (or 1236781672 counting only the distinct ones).

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

Adding to 11131035021 its reverse (12053013111), we get a palindrome (23184048132).

The spelling of 11131035021 in words is "eleven billion, one hundred thirty-one million, thirty-five thousand, twenty-one".