11103010021 has 4 divisors (see below), whose sum is σ = 11149080844. Its totient is φ = 11056939200.

The previous prime is 11103010019. The next prime is 11103010073. The reversal of 11103010021 is 12001030111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2806350625 + 8296659396 = 52975^2 + 91086^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103010021 - 2¹ = 11103010019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11103010081) 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, 23035050 + ... + 23035531.

It is an arithmetic number, because the mean of its divisors is an integer number (2787270211).

Almost surely, 2^11103010021 is an apocalyptic number.

It is an amenable number.

11103010021 is a deficient number, since it is larger than the sum of its proper divisors (46070823).

11103010021 is an equidigital number, since it uses as much as digits as its factorization.

11103010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46070822.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 11103010021 its reverse (12001030111), we get a palindrome (23104040132).

The spelling of 11103010021 in words is "eleven billion, one hundred three million, ten thousand, twenty-one".