2001001210020 has 72 divisors (see below), whose sum is σ = 6070932329280. Its totient is φ = 533492308800.

The previous prime is 2001001209989. The next prime is 2001001210067. The reversal of 2001001210020 is 200121001002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2001001209984 and 2001001210011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231490 + ... + 2013849.

Almost surely, 2^{2001001210020} is an apocalyptic number.

2001001210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001001210020 is an abundant number, since it is smaller than the sum of its proper divisors (4069931119260).

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

2001001210020 is a wasteful number, since it uses less digits than its factorization.

2001001210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250305 (or 2250300 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2001001210020 its reverse (200121001002), we get a palindrome (2201122211022).

The spelling of 2001001210020 in words is "two trillion, one billion, one million, two hundred ten thousand, twenty".