11004130021 has 4 divisors (see below), whose sum is σ = 11006300844. Its totient is φ = 11001959200.

The previous prime is 11004130019. The next prime is 11004130031. The reversal of 11004130021 is 12003140011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12003140011 = 557 ⋅21549623.

It can be written as a sum of positive squares in 2 ways, for example, as 3092916996 + 7911213025 = 55614^2 + 88945^2 .

It is a cyclic number.

It is not a de Polignac number, because 11004130021 - 2¹ = 11004130019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11004129983 and 11004130010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11004130001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077790 + ... + 1087951.

It is an arithmetic number, because the mean of its divisors is an integer number (2751575211).

Almost surely, 2^11004130021 is an apocalyptic number.

It is an amenable number.

11004130021 is a deficient number, since it is larger than the sum of its proper divisors (2170823).

11004130021 is an equidigital number, since it uses as much as digits as its factorization.

11004130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170822.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11004130021 its reverse (12003140011), we get a palindrome (23007270032).

The spelling of 11004130021 in words is "eleven billion, four million, one hundred thirty thousand, twenty-one".