13211505887 has 2 divisors, whose sum is σ = 13211505888. Its totient is φ = 13211505886.

The previous prime is 13211505863. The next prime is 13211505893. The reversal of 13211505887 is 78850511231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13211505887 - 2¹⁶ = 13211440351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13211505487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605752943 + 6605752944.

It is an arithmetic number, because the mean of its divisors is an integer number (6605752944).

Almost surely, 2^13211505887 is an apocalyptic number.

13211505887 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211505887 is an equidigital number, since it uses as much as digits as its factorization.

13211505887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 41.

The spelling of 13211505887 in words is "thirteen billion, two hundred eleven million, five hundred five thousand, eight hundred eighty-seven".