1012002020020 has 24 divisors (see below), whose sum is σ = 2198487148200. Its totient is φ = 390842159232.

The previous prime is 1012002020017. The next prime is 1012002020077. The reversal of 1012002020020 is 200202002101.

It can be written as a sum of positive squares in 4 ways, for example, as 146871364644 + 865130655376 = 383238^2 + 930124^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1012002019979 and 1012002020006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872414955 + ... + 872416114.

It is an arithmetic number, because the mean of its divisors is an integer number (91603631175).

Almost surely, 2^{1012002020020} is an apocalyptic number.

1012002020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012002020020 is an abundant number, since it is smaller than the sum of its proper divisors (1186485128180).

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

1012002020020 is a wasteful number, since it uses less digits than its factorization.

1012002020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744831107 (or 1744831105 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1012002020020 its reverse (200202002101), we get a palindrome (1212204022121).

The spelling of 1012002020020 in words is "one trillion, twelve billion, two million, twenty thousand, twenty".