1002020020000 has 60 divisors (see below), whose sum is σ = 2465119601406. Its totient is φ = 400808000000.

The previous prime is 1002020019961. The next prime is 1002020020019. The reversal of 1002020020000 is 200202001.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 162077097744 + 839942922256 = 402588^2 + 916484^2 .

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 in 9 ways as a sum of consecutive naturals, for example, 25030501 + ... + 25070500.

Almost surely, 2^{1002020020000} is an apocalyptic number.

1002020020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002020020000 is an abundant number, since it is smaller than the sum of its proper divisors (1463099581406).

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

1002020020000 is an frugal number, since it uses more digits than its factorization.

1002020020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50101031 (or 50101008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 1002020020000 its reverse (200202001), we get a palindrome (1002220222001).

The spelling of 1002020020000 in words is "one trillion, two billion, twenty million, twenty thousand".