11103561406251 has 12 divisors (see below), whose sum is σ = 16471949954512. Its totient is φ = 7202310101136.

The previous prime is 11103561406241. The next prime is 11103561406261. The reversal of 11103561406251 is 15260416530111.

11103561406251 is a `hidden beast` number, since 1 + 1 + 1 + 0 + 3 + 561 + 40 + 6 + 2 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (11103561406241) and next prime (11103561406261).

It is not a de Polignac number, because 11103561406251 - 2⁶ = 11103561406187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11103561406241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16672013791 + ... + 16672014456.

Almost surely, 2^{11103561406251} is an apocalyptic number.

11103561406251 is a deficient number, since it is larger than the sum of its proper divisors (5368388548261).

11103561406251 is a wasteful number, since it uses less digits than its factorization.

11103561406251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33344028290 (or 33344028287 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

Adding to 11103561406251 its reverse (15260416530111), we get a palindrome (26363977936362).

The spelling of 11103561406251 in words is "eleven trillion, one hundred three billion, five hundred sixty-one million, four hundred six thousand, two hundred fifty-one".