1131111105 has 32 divisors (see below), whose sum is σ = 1898830848. Its totient is φ = 574214400.

The previous prime is 1131111101. The next prime is 1131111139. The reversal of 1131111105 is 5011111311.

It is not a de Polignac number, because 1131111105 - 2² = 1131111101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1131111101) 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, 8427 + ... + 48303.

It is an arithmetic number, because the mean of its divisors is an integer number (59338464).

Almost surely, 2^1131111105 is an apocalyptic number.

1131111105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131111105 is a deficient number, since it is larger than the sum of its proper divisors (767719743).

1131111105 is a wasteful number, since it uses less digits than its factorization.

1131111105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39977.

The product of its (nonzero) digits is 15, while the sum is 15.

The square root of 1131111105 is about 33631.9952574925. The cubic root of 1131111105 is about 1041.9217134484.

Adding to 1131111105 its reverse (5011111311), we get a palindrome (6142222416).

The spelling of 1131111105 in words is "one billion, one hundred thirty-one million, one hundred eleven thousand, one hundred five".