1020021002 has 64 divisors (see below), whose sum is σ = 2125267200. Its totient is φ = 354170880.

The previous prime is 1020020983. The next prime is 1020021127. The reversal of 1020021002 is 2001200201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49274 + ... + 66842.

It is an arithmetic number, because the mean of its divisors is an integer number (33207300).

Almost surely, 2^1020021002 is an apocalyptic number.

1020021002 is an abundant number, since it is smaller than the sum of its proper divisors (1105246198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020021002 is a wasteful number, since it uses less digits than its factorization.

1020021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17631.

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

The square root of 1020021002 is about 31937.7676427142. The cubic root of 1020021002 is about 1006.6296183657.

Adding to 1020021002 its reverse (2001200201), we get a palindrome (3021221203).

The spelling of 1020021002 in words is "one billion, twenty million, twenty-one thousand, two".