1021331313 has 24 divisors (see below), whose sum is σ = 1550385408. Its totient is φ = 647069472.

The previous prime is 1021331293. The next prime is 1021331323. The reversal of 1021331313 is 3131331201.

It is a happy number.

1021331313 is a `hidden beast` number, since 1 + 0 + 21 + 331 + 313 = 666.

1021331313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021331313 - 2⁵ = 1021331281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021331323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21345 + ... + 49982.

It is an arithmetic number, because the mean of its divisors is an integer number (64599392).

Almost surely, 2^1021331313 is an apocalyptic number.

It is an amenable number.

1021331313 is a deficient number, since it is larger than the sum of its proper divisors (529054095).

1021331313 is a wasteful number, since it uses less digits than its factorization.

1021331313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71413 (or 71410 counting only the distinct ones).

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

The square root of 1021331313 is about 31958.2745623101. The cubic root of 1021331313 is about 1007.0604701065.

Adding to 1021331313 its reverse (3131331201), we get a palindrome (4152662514).

The spelling of 1021331313 in words is "one billion, twenty-one million, three hundred thirty-one thousand, three hundred thirteen".