1002021020002 has 4 divisors (see below), whose sum is σ = 1503031530006. Its totient is φ = 501010510000.

The previous prime is 1002021019939. The next prime is 1002021020081. The reversal of 1002021020002 is 2000201202001.

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., 999762014161 + 2259005841 = 999881^2 + 47529^2 .

It is a super-2 number, since 2×1002021020002² (a number of 25 digits) contains 22 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, 250505254999 + ... + 250505255002.

Almost surely, 2^{1002021020002} is an apocalyptic number.

1002021020002 is a deficient number, since it is larger than the sum of its proper divisors (501010510004).

1002021020002 is an equidigital number, since it uses as much as digits as its factorization.

1002021020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501010510003.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1002021020002 its reverse (2000201202001), we get a palindrome (3002222222003).

The spelling of 1002021020002 in words is "one trillion, two billion, twenty-one million, twenty thousand, two".