2001202022020 has 48 divisors (see below), whose sum is σ = 4212390612528. Its totient is φ = 798602065920.

The previous prime is 2001202021969. The next prime is 2001202022021. The reversal of 2001202022020 is 202202021002.

It can be written as a sum of positive squares in 8 ways, for example, as 926363900484 + 1074838121536 = 962478^2 + 1036744^2 .

It is not an unprimeable number, because it can be changed into a prime (2001202022021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75126624 + ... + 75153256.

It is an arithmetic number, because the mean of its divisors is an integer number (87758137761).

Almost surely, 2^{2001202022020} is an apocalyptic number.

2001202022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001202022020 is an abundant number, since it is smaller than the sum of its proper divisors (2211188590508).

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

2001202022020 is a wasteful number, since it uses less digits than its factorization.

2001202022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35320 (or 35318 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 2001202022020 its reverse (202202021002), we get a palindrome (2203404043022).

The spelling of 2001202022020 in words is "two trillion, one billion, two hundred two million, twenty-two thousand, twenty".