11111100121011 has 8 divisors (see below), whose sum is σ = 16161600176064. Its totient is φ = 6734000073320.

The previous prime is 11111100121003. The next prime is 11111100121087. The reversal of 11111100121011 is 11012100111111.

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 11111100121011 - 2³ = 11111100121003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111100121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168350001801 + ... + 168350001866.

It is an arithmetic number, because the mean of its divisors is an integer number (2020200022008).

Almost surely, 2^{11111100121011} is an apocalyptic number.

11111100121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111100121011 is a deficient number, since it is larger than the sum of its proper divisors (5050500055053).

11111100121011 is a wasteful number, since it uses less digits than its factorization.

11111100121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336700003681.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 11111100121011 its reverse (11012100111111), we get a palindrome (22123200232122).

The spelling of 11111100121011 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred twenty-one thousand, eleven".