1131242011 has 8 divisors (see below), whose sum is σ = 1151178800. Its totient is φ = 1111350240.

The previous prime is 1131242009. The next prime is 1131242023. The reversal of 1131242011 is 1102421311.

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 1131242011 - 2¹ = 1131242009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131242041) 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, 41605 + ... + 63193.

It is an arithmetic number, because the mean of its divisors is an integer number (143897350).

Almost surely, 2^1131242011 is an apocalyptic number.

1131242011 is a deficient number, since it is larger than the sum of its proper divisors (19936789).

1131242011 is an equidigital number, since it uses as much as digits as its factorization.

1131242011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22509.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1131242011 is about 33633.9413539359. The cubic root of 1131242011 is about 1041.9619065358.

Adding to 1131242011 its reverse (1102421311), we get a palindrome (2233663322).

The spelling of 1131242011 in words is "one billion, one hundred thirty-one million, two hundred forty-two thousand, eleven".