1021320313 has 16 divisors (see below), whose sum is σ = 1152256896. Its totient is φ = 898191360.

The previous prime is 1021320253. The next prime is 1021320331. The reversal of 1021320313 is 3130231201.

1021320313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021320313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021320353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70198 + ... + 83488.

It is an arithmetic number, because the mean of its divisors is an integer number (72016056).

Almost surely, 2^1021320313 is an apocalyptic number.

1021320313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1021320313 is a deficient number, since it is larger than the sum of its proper divisors (130936583).

1021320313 is a wasteful number, since it uses less digits than its factorization.

1021320313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1021320313 is about 31958.1024624429. The cubic root of 1021320313 is about 1007.0568546604.

Adding to 1021320313 its reverse (3130231201), we get a palindrome (4151551514).

The spelling of 1021320313 in words is "one billion, twenty-one million, three hundred twenty thousand, three hundred thirteen".