2001220012020 has 48 divisors (see below), whose sum is σ = 5847042821760. Its totient is φ = 510456118656.

The previous prime is 2001220012019. The next prime is 2001220012021. The reversal of 2001220012020 is 202100221002.

It is an interprime number because it is at equal distance from previous prime (2001220012019) and next prime (2001220012021).

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 = 2001220011987 and 2001220012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001220012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 725078335 + ... + 725081094.

It is an arithmetic number, because the mean of its divisors is an integer number (121813392120).

Almost surely, 2^{2001220012020} is an apocalyptic number.

2001220012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001220012020 is an abundant number, since it is smaller than the sum of its proper divisors (3845822809740).

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

2001220012020 is a wasteful number, since it uses less digits than its factorization.

2001220012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450159464 (or 1450159462 counting only the distinct ones).

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

Adding to 2001220012020 its reverse (202100221002), we get a palindrome (2203320233022).

The spelling of 2001220012020 in words is "two trillion, one billion, two hundred twenty million, twelve thousand, twenty".