2001122011220 has 96 divisors (see below), whose sum is σ = 4308068540160. Its totient is φ = 780620825600.

The previous prime is 2001122011201. The next prime is 2001122011247. The reversal of 2001122011220 is 221102211002.

It is a junction number, because it is equal to n+sod(n) for n = 2001122011195 and 2001122011204.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 47260979 + ... + 47303301.

It is an arithmetic number, because the mean of its divisors is an integer number (44875713960).

Almost surely, 2^{2001122011220} is an apocalyptic number.

2001122011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001122011220 is an abundant number, since it is smaller than the sum of its proper divisors (2306946528940).

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

2001122011220 is a wasteful number, since it uses less digits than its factorization.

2001122011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42785 (or 42783 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001122011220 its reverse (221102211002), we get a palindrome (2222224222222).

The spelling of 2001122011220 in words is "two trillion, one billion, one hundred twenty-two million, eleven thousand, two hundred twenty".