1021302013 has 12 divisors (see below), whose sum is σ = 1086110740. Its totient is φ = 960164352.

The previous prime is 1021301993. The next prime is 1021302017. The reversal of 1021302013 is 3102031201.

It can be written as a sum of positive squares in 6 ways, for example, as 26656569 + 994645444 = 5163^2 + 31538^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1021302013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021301984 and 1021302002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021302017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411745 + ... + 414217.

Almost surely, 2^1021302013 is an apocalyptic number.

It is an amenable number.

1021302013 is a deficient number, since it is larger than the sum of its proper divisors (64808727).

1021302013 is a wasteful number, since it uses less digits than its factorization.

1021302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936 (or 3919 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1021302013 is about 31957.8161487921. The cubic root of 1021302013 is about 1007.0508398153.

Adding to 1021302013 its reverse (3102031201), we get a palindrome (4123333214).

The spelling of 1021302013 in words is "one billion, twenty-one million, three hundred two thousand, thirteen".