1002021109993 has 2 divisors, whose sum is σ = 1002021109994. Its totient is φ = 1002021109992.

The previous prime is 1002021109877. The next prime is 1002021110047. The reversal of 1002021109993 is 3999011202001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996457143529 + 5563966464 = 998227^2 + 74592^2 .

It is an emirp because it is prime and its reverse (3999011202001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002021109993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002021104993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501010554996 + 501010554997.

It is an arithmetic number, because the mean of its divisors is an integer number (501010554997).

Almost surely, 2^{1002021109993} is an apocalyptic number.

It is an amenable number.

1002021109993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002021109993 is an equidigital number, since it uses as much as digits as its factorization.

1002021109993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 1002021109993 in words is "one trillion, two billion, twenty-one million, one hundred nine thousand, nine hundred ninety-three".