1001001021002 has 4 divisors (see below), whose sum is σ = 1501501531506. Its totient is φ = 500500510500.

The previous prime is 1001001020953. The next prime is 1001001021037. The reversal of 1001001021002 is 2001201001001.

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

It can be written as a sum of positive squares in only one way, i.e., 930860265721 + 70140755281 = 964811^2 + 264841^2 .

It is an unprimeable number.

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, 250250255249 + ... + 250250255252.

Almost surely, 2^{1001001021002} is an apocalyptic number.

1001001021002 is a deficient number, since it is larger than the sum of its proper divisors (500500510504).

1001001021002 is an equidigital number, since it uses as much as digits as its factorization.

1001001021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500500510503.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1001001021002 its reverse (2001201001001), we get a palindrome (3002202022003).

The spelling of 1001001021002 in words is "one trillion, one billion, one million, twenty-one thousand, two".