2001132220 has 48 divisors (see below), whose sum is σ = 4453420608. Its totient is φ = 752716800.

The previous prime is 2001132209. The next prime is 2001132233. The reversal of 2001132220 is 222311002.

It is a self number, because there is not a number n which added to its sum of digits gives 2001132220.

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 15 ways as a sum of consecutive naturals, for example, 604570 + ... + 607870.

It is an arithmetic number, because the mean of its divisors is an integer number (92779596).

Almost surely, 2^2001132220 is an apocalyptic number.

2001132220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001132220 is an abundant number, since it is smaller than the sum of its proper divisors (2452288388).

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

2001132220 is a wasteful number, since it uses less digits than its factorization.

2001132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110 (or 5108 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2001132220 is about 44734.0163633895. The cubic root of 2001132220 is about 1260.1587563464.

Adding to 2001132220 its reverse (222311002), we get a palindrome (2223443222).

The spelling of 2001132220 in words is "two billion, one million, one hundred thirty-two thousand, two hundred twenty".