1131111138 has 8 divisors (see below), whose sum is σ = 2262222288. Its totient is φ = 377037044.

The previous prime is 1131111101. The next prime is 1131111139. The reversal of 1131111138 is 8311111311.

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

1131111138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1131111139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94259256 + ... + 94259267.

It is an arithmetic number, because the mean of its divisors is an integer number (282777786).

Almost surely, 2^1131111138 is an apocalyptic number.

1131111138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131111138 is a wasteful number, since it uses less digits than its factorization.

1131111138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188518528.

The product of its digits is 72, while the sum is 21.

The square root of 1131111138 is about 33631.9957480968. The cubic root of 1131111138 is about 1041.9217235811.

Adding to 1131111138 its reverse (8311111311), we get a palindrome (9442222449).

The spelling of 1131111138 in words is "one billion, one hundred thirty-one million, one hundred eleven thousand, one hundred thirty-eight".