1001000002020 has 96 divisors (see below), whose sum is σ = 2968287348096. Its totient is φ = 251179161600.

The previous prime is 1001000001949. The next prime is 1001000002073. The reversal of 1001000002020 is 202000001001.

It is a happy number.

1001000002020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4930110 + ... + 5129130.

It is an arithmetic number, because the mean of its divisors is an integer number (30919659876).

Almost surely, 2^{1001000002020} is an apocalyptic number.

1001000002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001000002020 is an abundant number, since it is smaller than the sum of its proper divisors (1967287346076).

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

1001000002020 is a wasteful number, since it uses less digits than its factorization.

1001000002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203981 (or 203979 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 1001000002020 its reverse (202000001001), we get a palindrome (1203000003021).

The spelling of 1001000002020 in words is "one trillion, one billion, two thousand, twenty".