1002021313 has 4 divisors (see below), whose sum is σ = 1002940848. Its totient is φ = 1001101780.

The previous prime is 1002021299. The next prime is 1002021323. The reversal of 1002021313 is 3131202001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002021313 - 2⁵ = 1002021281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002021293 and 1002021302.

It is not an unprimeable number, because it can be changed into a prime (1002021323) 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, 458131 + ... + 460312.

It is an arithmetic number, because the mean of its divisors is an integer number (250735212).

Almost surely, 2^1002021313 is an apocalyptic number.

It is an amenable number.

1002021313 is a deficient number, since it is larger than the sum of its proper divisors (919535).

1002021313 is an equidigital number, since it uses as much as digits as its factorization.

1002021313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919534.

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

The square root of 1002021313 is about 31654.7202325340. The cubic root of 1002021313 is about 1000.6733175417.

Adding to 1002021313 its reverse (3131202001), we get a palindrome (4133223314).

The spelling of 1002021313 in words is "one billion, two million, twenty-one thousand, three hundred thirteen".