11001110021 has 4 divisors (see below), whose sum is σ = 12001210944. Its totient is φ = 10001009100.

The previous prime is 11001109993. The next prime is 11001110033. The reversal of 11001110021 is 12001110011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11001110021 - 2¹⁸ = 11000847877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11001109990 and 11001110008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001110041) 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 3 ways as a sum of consecutive naturals, for example, 500050445 + ... + 500050466.

It is an arithmetic number, because the mean of its divisors is an integer number (3000302736).

Almost surely, 2^11001110021 is an apocalyptic number.

11001110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11001110021 is a deficient number, since it is larger than the sum of its proper divisors (1000100923).

11001110021 is a wasteful number, since it uses less digits than its factorization.

11001110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000100922.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11001110021 its reverse (12001110011), we get a palindrome (23002220032).

The spelling of 11001110021 in words is "eleven billion, one million, one hundred ten thousand, twenty-one".