1021335013 has 8 divisors (see below), whose sum is σ = 1049338232. Its totient is φ = 993352896.

The previous prime is 1021335001. The next prime is 1021335023. The reversal of 1021335013 is 3105331201.

It can be written as a sum of positive squares in 4 ways, for example, as 686335204 + 334999809 = 26198^2 + 18303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021335013 - 2⁵ = 1021334981 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 (1021335023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185131 + ... + 190567.

It is an arithmetic number, because the mean of its divisors is an integer number (131167279).

Almost surely, 2^1021335013 is an apocalyptic number.

It is an amenable number.

1021335013 is a deficient number, since it is larger than the sum of its proper divisors (28003219).

1021335013 is an equidigital number, since it uses as much as digits as its factorization.

1021335013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1021335013 is about 31958.3324502390. The cubic root of 1021335013 is about 1007.0616862053.

Adding to 1021335013 its reverse (3105331201), we get a palindrome (4126666214).

The spelling of 1021335013 in words is "one billion, twenty-one million, three hundred thirty-five thousand, thirteen".