1301331121 has 4 divisors (see below), whose sum is σ = 1301749092. Its totient is φ = 1300913152.

The previous prime is 1301331091. The next prime is 1301331133. The reversal of 1301331121 is 1211331031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1226750625 + 74580496 = 35025^2 + 8636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1301331121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301331095 and 1301331104.

It is not an unprimeable number, because it can be changed into a prime (1301331221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204280 + ... + 210553.

It is an arithmetic number, because the mean of its divisors is an integer number (325437273).

Almost surely, 2^1301331121 is an apocalyptic number.

It is an amenable number.

1301331121 is a deficient number, since it is larger than the sum of its proper divisors (417971).

1301331121 is an equidigital number, since it uses as much as digits as its factorization.

1301331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417970.

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

The square root of 1301331121 is about 36073.9673587478. The cubic root of 1301331121 is about 1091.7652626550.

Adding to 1301331121 its reverse (1211331031), we get a palindrome (2512662152).

The spelling of 1301331121 in words is "one billion, three hundred one million, three hundred thirty-one thousand, one hundred twenty-one".