11103312281 has 2 divisors, whose sum is σ = 11103312282. Its totient is φ = 11103312280.

The previous prime is 11103312223. The next prime is 11103312329. The reversal of 11103312281 is 18221330111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6254279056 + 4849033225 = 79084^2 + 69635^2 .

It is a cyclic number.

It is not a de Polignac number, because 11103312281 - 2²⁶ = 11036203417 is a prime.

It is a super-2 number, since 2×11103312281² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11109312281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5551656140 + 5551656141.

It is an arithmetic number, because the mean of its divisors is an integer number (5551656141).

Almost surely, 2^11103312281 is an apocalyptic number.

It is an amenable number.

11103312281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11103312281 is an equidigital number, since it uses as much as digits as its factorization.

11103312281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 11103312281 its reverse (18221330111), we get a palindrome (29324642392).

The spelling of 11103312281 in words is "eleven billion, one hundred three million, three hundred twelve thousand, two hundred eighty-one".