1021312303 has 16 divisors (see below), whose sum is σ = 1149189120. Its totient is φ = 899668000.

The previous prime is 1021312297. The next prime is 1021312333. The reversal of 1021312303 is 3032131201.

It is not a de Polignac number, because 1021312303 - 2²⁵ = 987757871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021312333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42438 + ... + 61996.

It is an arithmetic number, because the mean of its divisors is an integer number (71824320).

Almost surely, 2^1021312303 is an apocalyptic number.

1021312303 is a deficient number, since it is larger than the sum of its proper divisors (127876817).

1021312303 is a wasteful number, since it uses less digits than its factorization.

1021312303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19718.

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

The square root of 1021312303 is about 31957.9771418655. The cubic root of 1021312303 is about 1007.0542219420.

Adding to 1021312303 its reverse (3032131201), we get a palindrome (4053443504).

The spelling of 1021312303 in words is "one billion, twenty-one million, three hundred twelve thousand, three hundred three".