11111111211305 has 8 divisors (see below), whose sum is σ = 15238095375552. Its totient is φ = 7619047687728.

The previous prime is 11111111211293. The next prime is 11111111211307. The reversal of 11111111211305 is 50311211111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111111211305 - 2⁴ = 11111111211289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111111211307) 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 in 7 ways as a sum of consecutive naturals, for example, 158730160127 + ... + 158730160196.

It is an arithmetic number, because the mean of its divisors is an integer number (1904761921944).

Almost surely, 2^{11111111211305} is an apocalyptic number.

It is an amenable number.

11111111211305 is a deficient number, since it is larger than the sum of its proper divisors (4126984164247).

11111111211305 is an equidigital number, since it uses as much as digits as its factorization.

11111111211305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317460320335.

The product of its (nonzero) digits is 30, while the sum is 20.

Adding to 11111111211305 its reverse (50311211111111), we get a palindrome (61422322322416).

The spelling of 11111111211305 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, two hundred eleven thousand, three hundred five".