11155551151 has 2 divisors, whose sum is σ = 11155551152. Its totient is φ = 11155551150.

The previous prime is 11155551031. The next prime is 11155551161. The reversal of 11155551151 is 15115555111.

It is a strong prime.

It is an emirp because it is prime and its reverse (15115555111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11155551151 - 2¹⁵ = 11155518383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155551161) 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 as a sum of consecutive naturals, namely, 5577775575 + 5577775576.

It is an arithmetic number, because the mean of its divisors is an integer number (5577775576).

Almost surely, 2^11155551151 is an apocalyptic number.

11155551151 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155551151 is an equidigital number, since it uses as much as digits as its factorization.

11155551151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3125, while the sum is 31.

The spelling of 11155551151 in words is "eleven billion, one hundred fifty-five million, five hundred fifty-one thousand, one hundred fifty-one".