1001021002003 has 24 divisors (see below), whose sum is σ = 1151757651744. Its totient is φ = 867706371840.

The previous prime is 1001021001989. The next prime is 1001021002013. The reversal of 1001021002003 is 3002001201001.

It is not a de Polignac number, because 1001021002003 - 2⁵ = 1001021001971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001021002013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 314875 + ... + 1449547.

It is an arithmetic number, because the mean of its divisors is an integer number (47989902156).

Almost surely, 2^{1001021002003} is an apocalyptic number.

1001021002003 is a deficient number, since it is larger than the sum of its proper divisors (150736649741).

1001021002003 is a wasteful number, since it uses less digits than its factorization.

1001021002003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135035 (or 1135024 counting only the distinct ones).

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

Adding to 1001021002003 its reverse (3002001201001), we get a palindrome (4003022203004).

The spelling of 1001021002003 in words is "one trillion, one billion, twenty-one million, two thousand, three".