11103313021 has 2 divisors, whose sum is σ = 11103313022. Its totient is φ = 11103313020.

The previous prime is 11103313009. The next prime is 11103313063. The reversal of 11103313021 is 12031330111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8271902500 + 2831410521 = 90950^2 + 53211^2 .

It is an emirp because it is prime and its reverse (12031330111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11103313021 - 2⁵ = 11103312989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11103312986 and 11103313004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11103317021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551656510 + 5551656511.

It is an arithmetic number, because the mean of its divisors is an integer number (5551656511).

Almost surely, 2^11103313021 is an apocalyptic number.

It is an amenable number.

11103313021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103313021 is an equidigital number, since it uses as much as digits as its factorization.

11103313021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 11103313021 its reverse (12031330111), we get a palindrome (23134643132).

The spelling of 11103313021 in words is "eleven billion, one hundred three million, three hundred thirteen thousand, twenty-one".