1131440121 has 12 divisors (see below), whose sum is σ = 1867774272. Its totient is φ = 646537176.

The previous prime is 1131440111. The next prime is 1131440129. The reversal of 1131440121 is 1210441311.

It is not a de Polignac number, because 1131440121 - 2⁹ = 1131439609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131440094 and 1131440103.

It is not an unprimeable number, because it can be changed into a prime (1131440129) 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 11 ways as a sum of consecutive naturals, for example, 8979621 + ... + 8979746.

It is an arithmetic number, because the mean of its divisors is an integer number (155647856).

Almost surely, 2^1131440121 is an apocalyptic number.

It is an amenable number.

1131440121 is a deficient number, since it is larger than the sum of its proper divisors (736334151).

1131440121 is a wasteful number, since it uses less digits than its factorization.

1131440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17959380 (or 17959377 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1131440121 is about 33636.8863154722. The cubic root of 1131440121 is about 1042.0227278934.

Adding to 1131440121 its reverse (1210441311), we get a palindrome (2341881432).

The spelling of 1131440121 in words is "one billion, one hundred thirty-one million, four hundred forty thousand, one hundred twenty-one".