1021005316 has 12 divisors (see below), whose sum is σ = 1805180188. Its totient is φ = 505239552.

The previous prime is 1021005283. The next prime is 1021005317. The reversal of 1021005316 is 6135001201.

1021005316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 385965316 + 635040000 = 19646^2 + 25200^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1021005293 and 1021005302.

It is not an unprimeable number, because it can be changed into a prime (1021005317) 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, 1315341 + ... + 1316116.

Almost surely, 2^1021005316 is an apocalyptic number.

It is an amenable number.

1021005316 is a deficient number, since it is larger than the sum of its proper divisors (784174872).

1021005316 is a wasteful number, since it uses less digits than its factorization.

1021005316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631558 (or 2631556 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1021005316 is about 31953.1738016742. The cubic root of 1021005316 is about 1006.9533113998.

Adding to 1021005316 its reverse (6135001201), we get a palindrome (7156006517).

It can be divided in two parts, 102100 and 5316, that added together give a triangular number (107416 = T₄₆₃).

The spelling of 1021005316 in words is "one billion, twenty-one million, five thousand, three hundred sixteen".