1131405011 has 8 divisors (see below), whose sum is σ = 1234603200. Its totient is φ = 1028264040.

The previous prime is 1131405007. The next prime is 1131405031. The reversal of 1131405011 is 1105041311.

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 1131405011 - 2² = 1131405007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131405031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34220 + ... + 58598.

It is an arithmetic number, because the mean of its divisors is an integer number (154325400).

Almost surely, 2^1131405011 is an apocalyptic number.

1131405011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131405011 is a deficient number, since it is larger than the sum of its proper divisors (103198189).

1131405011 is a wasteful number, since it uses less digits than its factorization.

1131405011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28609.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 1131405011 is about 33636.3644141278. The cubic root of 1131405011 is about 1042.0119493597.

Adding to 1131405011 its reverse (1105041311), we get a palindrome (2236446322).

The spelling of 1131405011 in words is "one billion, one hundred thirty-one million, four hundred five thousand, eleven".