1021001002003 has 2 divisors, whose sum is σ = 1021001002004. Its totient is φ = 1021001002002.

The previous prime is 1021001001967. The next prime is 1021001002009. The reversal of 1021001002003 is 3002001001201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021001002003 is a prime.

It is a super-2 number, since 2×1021001002003² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021001002009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510500501001 + 510500501002.

It is an arithmetic number, because the mean of its divisors is an integer number (510500501002).

Almost surely, 2^{1021001002003} is an apocalyptic number.

1021001002003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021001002003 is an equidigital number, since it uses as much as digits as its factorization.

1021001002003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 1021001002003 its reverse (3002001001201), we get a palindrome (4023002003204).

The spelling of 1021001002003 in words is "one trillion, twenty-one billion, one million, two thousand, three".