1321103313 has 6 divisors (see below), whose sum is σ = 1908260354. Its totient is φ = 880735536.

The previous prime is 1321103309. The next prime is 1321103317. The reversal of 1321103313 is 3133011231.

It is a happy number.

1321103313 is a `hidden beast` number, since 1 + 321 + 10 + 331 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1321103309) and next prime (1321103317).

It can be written as a sum of positive squares in only one way, i.e., 814988304 + 506115009 = 28548^2 + 22497^2 .

It is not a de Polignac number, because 1321103313 - 2² = 1321103309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321103317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73394620 + ... + 73394637.

Almost surely, 2^1321103313 is an apocalyptic number.

It is an amenable number.

1321103313 is a deficient number, since it is larger than the sum of its proper divisors (587157041).

1321103313 is a wasteful number, since it uses less digits than its factorization.

1321103313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146789263 (or 146789260 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1321103313 is about 36346.9849230992. The cubic root of 1321103313 is about 1097.2668545840.

Adding to 1321103313 its reverse (3133011231), we get a palindrome (4454114544).

The spelling of 1321103313 in words is "one billion, three hundred twenty-one million, one hundred three thousand, three hundred thirteen".