1121344013 has 4 divisors (see below), whose sum is σ = 1122349020. Its totient is φ = 1120339008.

The previous prime is 1121344009. The next prime is 1121344031. The reversal of 1121344013 is 3104431211.

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 82119844 + 1039224169 = 9062^2 + 32237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121344013 - 2² = 1121344009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121344043) 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, 500828 + ... + 503061.

It is an arithmetic number, because the mean of its divisors is an integer number (280587255).

Almost surely, 2^1121344013 is an apocalyptic number.

It is an amenable number.

1121344013 is a deficient number, since it is larger than the sum of its proper divisors (1005007).

1121344013 is a wasteful number, since it uses less digits than its factorization.

1121344013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005006.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1121344013 is about 33486.4750757675. The cubic root of 1121344013 is about 1038.9140578640.

Adding to 1121344013 its reverse (3104431211), we get a palindrome (4225775224).

The spelling of 1121344013 in words is "one billion, one hundred twenty-one million, three hundred forty-four thousand, thirteen".