1002020000000 has 144 divisors (see below), whose sum is σ = 2500200826032. Its totient is φ = 400800000000.

The previous prime is 1002019999991. The next prime is 1002020000027. The reversal of 1002020000000 is 202001.

It can be written as a sum of positive squares in 8 ways, for example, as 584331821056 + 417688178944 = 764416^2 + 646288^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19974950 + ... + 20025050.

Almost surely, 2^{1002020000000} is an apocalyptic number.

1002020000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002020000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250100413016).

1002020000000 is an abundant number, since it is smaller than the sum of its proper divisors (1498180826032).

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

1002020000000 is an frugal number, since it uses more digits than its factorization.

1002020000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50152 (or 50108 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

Adding to 1002020000000 its reverse (202001), we get a palindrome (1002020202001).

The spelling of 1002020000000 in words is "one trillion, two billion, twenty million", and thus it is an aban number and an uban number.