1131241011 has 4 divisors (see below), whose sum is σ = 1508321352. Its totient is φ = 754160672.

The previous prime is 1131241009. The next prime is 1131241021. The reversal of 1131241011 is 1101421311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1131241011 - 2¹ = 1131241009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131241021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188540166 + ... + 188540171.

It is an arithmetic number, because the mean of its divisors is an integer number (377080338).

Almost surely, 2^1131241011 is an apocalyptic number.

1131241011 is a deficient number, since it is larger than the sum of its proper divisors (377080341).

1131241011 is an equidigital number, since it uses as much as digits as its factorization.

1131241011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377080340.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 1131241011 is about 33633.9264879972. The cubic root of 1131241011 is about 1041.9615995098.

Adding to 1131241011 its reverse (1101421311), we get a palindrome (2232662322).

The spelling of 1131241011 in words is "one billion, one hundred thirty-one million, two hundred forty-one thousand, eleven".