1020001002002 has 4 divisors (see below), whose sum is σ = 1530001503006. Its totient is φ = 510000501000.

The previous prime is 1020001001969. The next prime is 1020001002011. The reversal of 1020001002002 is 2002001000201.

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., 562996609561 + 457004392441 = 750331^2 + 676021^2 .

It is a super-3 number, since 3×1020001002002³ (a number of 37 digits) contains 333 as substring.

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, 255000250499 + ... + 255000250502.

Almost surely, 2^{1020001002002} is an apocalyptic number.

1020001002002 is a deficient number, since it is larger than the sum of its proper divisors (510000501004).

1020001002002 is an equidigital number, since it uses as much as digits as its factorization.

1020001002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510000501003.

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

Adding to 1020001002002 its reverse (2002001000201), we get a palindrome (3022002002203).

The spelling of 1020001002002 in words is "one trillion, twenty billion, one million, two thousand, two".