1321311141 has 36 divisors (see below), whose sum is σ = 1998826284. Its totient is φ = 840585600.

The previous prime is 1321311133. The next prime is 1321311143. The reversal of 1321311141 is 1411131231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 477641025 + 843670116 = 21855^2 + 29046^2 .

It is not a de Polignac number, because 1321311141 - 2³ = 1321311133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321311143) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 814311 + ... + 815931.

Almost surely, 2^1321311141 is an apocalyptic number.

It is an amenable number.

1321311141 is a deficient number, since it is larger than the sum of its proper divisors (677515143).

1321311141 is a wasteful number, since it uses less digits than its factorization.

1321311141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1712 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1321311141 is about 36349.8437548224. The cubic root of 1321311141 is about 1097.3243900335.

Adding to 1321311141 its reverse (1411131231), we get a palindrome (2732442372).

The spelling of 1321311141 in words is "one billion, three hundred twenty-one million, three hundred eleven thousand, one hundred forty-one".