11211251087 has 2 divisors, whose sum is σ = 11211251088. Its totient is φ = 11211251086.

The previous prime is 11211251083. The next prime is 11211251111. The reversal of 11211251087 is 78015211211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11211251087 - 2² = 11211251083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211251083) 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, 5605625543 + 5605625544.

It is an arithmetic number, because the mean of its divisors is an integer number (5605625544).

Almost surely, 2^11211251087 is an apocalyptic number.

11211251087 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211251087 is an equidigital number, since it uses as much as digits as its factorization.

11211251087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 29.

Adding to 11211251087 its reverse (78015211211), we get a palindrome (89226462298).

The spelling of 11211251087 in words is "eleven billion, two hundred eleven million, two hundred fifty-one thousand, eighty-seven".