2001011202020 has 48 divisors (see below), whose sum is σ = 4306157296560. Its totient is φ = 780763117056.

The previous prime is 2001011202013. The next prime is 2001011202137. The reversal of 2001011202020 is 202021101002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4719140416 + 1996292061604 = 68696^2 + 1412902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001011201992 and 2001011202010.

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, 5272535 + ... + 5639294.

It is an arithmetic number, because the mean of its divisors is an integer number (89711610345).

Almost surely, 2^{2001011202020} is an apocalyptic number.

2001011202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001011202020 is an abundant number, since it is smaller than the sum of its proper divisors (2305146094540).

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

2001011202020 is a wasteful number, since it uses less digits than its factorization.

2001011202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10912064 (or 10912062 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2001011202020 its reverse (202021101002), we get a palindrome (2203032303022).

The spelling of 2001011202020 in words is "two trillion, one billion, eleven million, two hundred two thousand, twenty".