11111001100111 has 16 divisors (see below), whose sum is σ = 12345487948800. Its totient is φ = 9915156064800.

The previous prime is 11111001100057. The next prime is 11111001100117. The reversal of 11111001100111 is 11100110011111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11111001100111 - 2¹³ = 11111001091919 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111001100117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30883671 + ... + 31241368.

It is an arithmetic number, because the mean of its divisors is an integer number (771592996800).

Almost surely, 2^{11111001100111} is an apocalyptic number.

11111001100111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111001100111 is a deficient number, since it is larger than the sum of its proper divisors (1234486848689).

11111001100111 is a wasteful number, since it uses less digits than its factorization.

11111001100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62125350.

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 11111001100111 its reverse (11100110011111), we get a palindrome (22211111111222).

It can be divided in two parts, 11 and 111001100111, that multiplied together give a palindrome (1221012101221).

The spelling of 11111001100111 in words is "eleven trillion, one hundred eleven billion, one million, one hundred thousand, one hundred eleven".