1021020002003 has 2 divisors, whose sum is σ = 1021020002004. Its totient is φ = 1021020002002.

The previous prime is 1021020001997. The next prime is 1021020002071. The reversal of 1021020002003 is 3002000201201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021020002003 - 2²⁸ = 1020751566547 is a prime.

It is a super-2 number, since 2×1021020002003² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021020004003) 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 as a sum of consecutive naturals, namely, 510510001001 + 510510001002.

It is an arithmetic number, because the mean of its divisors is an integer number (510510001002).

Almost surely, 2^{1021020002003} is an apocalyptic number.

1021020002003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021020002003 is an equidigital number, since it uses as much as digits as its factorization.

1021020002003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 1021020002003 its reverse (3002000201201), we get a palindrome (4023020203204).

The spelling of 1021020002003 in words is "one trillion, twenty-one billion, twenty million, two thousand, three".