11011111387 has 2 divisors, whose sum is σ = 11011111388. Its totient is φ = 11011111386.

The previous prime is 11011111357. The next prime is 11011111451. The reversal of 11011111387 is 78311111011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11011111387 - 2¹¹ = 11011109339 is a prime.

It is not a weakly prime, because it can be changed into another prime (11011111337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505555693 + 5505555694.

It is an arithmetic number, because the mean of its divisors is an integer number (5505555694).

Almost surely, 2^11011111387 is an apocalyptic number.

11011111387 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011111387 is an equidigital number, since it uses as much as digits as its factorization.

11011111387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 25.

Adding to 11011111387 its reverse (78311111011), we get a palindrome (89322222398).

The spelling of 11011111387 in words is "eleven billion, eleven million, one hundred eleven thousand, three hundred eighty-seven".