2001020120220 has 96 divisors (see below), whose sum is σ = 6112429908480. Its totient is φ = 485078088960.

The previous prime is 2001020120191. The next prime is 2001020120237. The reversal of 2001020120220 is 220210201002.

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 = 2001020120196 and 2001020120205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33048294 + ... + 33108786.

It is an arithmetic number, because the mean of its divisors is an integer number (63671144880).

Almost surely, 2^{2001020120220} is an apocalyptic number.

2001020120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001020120220 is an abundant number, since it is smaller than the sum of its proper divisors (4111409788260).

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

2001020120220 is a wasteful number, since it uses less digits than its factorization.

2001020120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110635 (or 110633 counting only the distinct ones).

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

Adding to 2001020120220 its reverse (220210201002), we get a palindrome (2221230321222).

The spelling of 2001020120220 in words is "two trillion, one billion, twenty million, one hundred twenty thousand, two hundred twenty".