1001000202020 has 96 divisors (see below), whose sum is σ = 2587881101568. Its totient is φ = 316716728832.

The previous prime is 1001000202017. The next prime is 1001000202067. The reversal of 1001000202020 is 202020001001.

It is a junction number, because it is equal to n+sod(n) for n = 1001000201989 and 1001000202007.

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 31 ways as a sum of consecutive naturals, for example, 7040354 + ... + 7181126.

It is an arithmetic number, because the mean of its divisors is an integer number (26957094808).

Almost surely, 2^{1001000202020} is an apocalyptic number.

1001000202020 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 1001000202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293940550784).

1001000202020 is an abundant number, since it is smaller than the sum of its proper divisors (1586880899548).

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

1001000202020 is a wasteful number, since it uses less digits than its factorization.

1001000202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144709 (or 144707 counting only the distinct ones).

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

Adding to 1001000202020 its reverse (202020001001), we get a palindrome (1203020203021).

The spelling of 1001000202020 in words is "one trillion, one billion, two hundred two thousand, twenty".