1002313021021 has 4 divisors (see below), whose sum is σ = 1079414022652. Its totient is φ = 925212019392.

The previous prime is 1002313021019. The next prime is 1002313021057. The reversal of 1002313021021 is 1201203132001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132103898521 + 870209122500 = 363461^2 + 932850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002313021021 - 2¹ = 1002313021019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002313020986 and 1002313021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002313021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38550500796 + ... + 38550500821.

It is an arithmetic number, because the mean of its divisors is an integer number (269853505663).

Almost surely, 2^{1002313021021} is an apocalyptic number.

It is an amenable number.

1002313021021 is a deficient number, since it is larger than the sum of its proper divisors (77101001631).

1002313021021 is an equidigital number, since it uses as much as digits as its factorization.

1002313021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77101001630.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1002313021021 its reverse (1201203132001), we get a palindrome (2203516153022).

The spelling of 1002313021021 in words is "one trillion, two billion, three hundred thirteen million, twenty-one thousand, twenty-one".