2001022012020 has 96 divisors (see below), whose sum is σ = 5750231316480. Its totient is φ = 519751765120.

The previous prime is 2001022011971. The next prime is 2001022012039. The reversal of 2001022012020 is 202102201002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2001022011987 and 2001022012005.

It is a congruent number.

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, 2476080 + ... + 3183239.

It is an arithmetic number, because the mean of its divisors is an integer number (59898242880).

Almost surely, 2^{2001022012020} is an apocalyptic number.

2001022012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001022012020 is an abundant number, since it is smaller than the sum of its proper divisors (3749209304460).

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

2001022012020 is a wasteful number, since it uses less digits than its factorization.

2001022012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659485 (or 5659483 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 2001022012020 its reverse (202102201002), we get a palindrome (2203124213022).

It can be divided in two parts, 200102 and 2012020, that added together give a palindrome (2212122).

The spelling of 2001022012020 in words is "two trillion, one billion, twenty-two million, twelve thousand, twenty".