1001002020103 has 4 divisors (see below), whose sum is σ = 1044523847088. Its totient is φ = 957480193120.

The previous prime is 1001002020079. The next prime is 1001002020133. The reversal of 1001002020103 is 3010202001001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001002020103 - 2³⁷ = 863563066631 is a prime.

It is a super-2 number, since 2×1001002020103² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001002020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001002020133) 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 in 3 ways as a sum of consecutive naturals, for example, 21760913458 + ... + 21760913503.

It is an arithmetic number, because the mean of its divisors is an integer number (261130961772).

Almost surely, 2^{1001002020103} is an apocalyptic number.

1001002020103 is a deficient number, since it is larger than the sum of its proper divisors (43521826985).

1001002020103 is an equidigital number, since it uses as much as digits as its factorization.

1001002020103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43521826984.

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

Adding to 1001002020103 its reverse (3010202001001), we get a palindrome (4011204021104).

The spelling of 1001002020103 in words is "one trillion, one billion, two million, twenty thousand, one hundred three".