1131303121 has 8 divisors (see below), whose sum is σ = 1230390504. Its totient is φ = 1033939200.

The previous prime is 1131303109. The next prime is 1131303161. The reversal of 1131303121 is 1213031311.

It can be written as a sum of positive squares in 4 ways, for example, as 246835521 + 884467600 = 15711^2 + 29740^2 .

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 1131303121 - 2¹³ = 1131294929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131303095 and 1131303104.

It is not an unprimeable number, because it can be changed into a prime (1131303101) 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, 429496 + ... + 432121.

It is an arithmetic number, because the mean of its divisors is an integer number (153798813).

Almost surely, 2^1131303121 is an apocalyptic number.

It is an amenable number.

1131303121 is a deficient number, since it is larger than the sum of its proper divisors (99087383).

1131303121 is a wasteful number, since it uses less digits than its factorization.

1131303121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861731.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1131303121 is about 33634.8497989808. The cubic root of 1131303121 is about 1041.9806685528.

Adding to 1131303121 its reverse (1213031311), we get a palindrome (2344334432).

The spelling of 1131303121 in words is "one billion, one hundred thirty-one million, three hundred three thousand, one hundred twenty-one".