1111161111105 has 32 divisors (see below), whose sum is σ = 1790066085120. Its totient is φ = 588551731200.

The previous prime is 1111161111101. The next prime is 1111161111149. The reversal of 1111161111105 is 5011111611111.

It is not a de Polignac number, because 1111161111105 - 2² = 1111161111101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111161111101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9620941 + ... + 9735749.

It is an arithmetic number, because the mean of its divisors is an integer number (55939565160).

Almost surely, 2^{1111161111105} is an apocalyptic number.

1111161111105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1111161111105 is a deficient number, since it is larger than the sum of its proper divisors (678904974015).

1111161111105 is a wasteful number, since it uses less digits than its factorization.

1111161111105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119241.

The product of its (nonzero) digits is 30, while the sum is 21.

Adding to 1111161111105 its reverse (5011111611111), we get a palindrome (6122272722216).

It can be divided in two parts, 1111161 and 111105, that added together give a triangular number (1222266 = T₁₅₆₃).

The spelling of 1111161111105 in words is "one trillion, one hundred eleven billion, one hundred sixty-one million, one hundred eleven thousand, one hundred five".