1000200021802 has 4 divisors (see below), whose sum is σ = 1500300032706. Its totient is φ = 500100010900.

The previous prime is 1000200021791. The next prime is 1000200021841. The reversal of 1000200021802 is 2081200020001.

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., 745012385881 + 255187635921 = 863141^2 + 505161^2 .

It is a super-2 number, since 2×1000200021802² (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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250050005449 + ... + 250050005452.

Almost surely, 2^{1000200021802} is an apocalyptic number.

1000200021802 is a deficient number, since it is larger than the sum of its proper divisors (500100010904).

1000200021802 is an equidigital number, since it uses as much as digits as its factorization.

1000200021802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500100010903.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1000200021802 its reverse (2081200020001), we get a palindrome (3081400041803).

The spelling of 1000200021802 in words is "one trillion, two hundred million, twenty-one thousand, eight hundred two".