2002011220 has 24 divisors (see below), whose sum is σ = 4586426208. Its totient is φ = 728004000.

The previous prime is 2002011199. The next prime is 2002011223. The reversal of 2002011220 is 221102002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2002011197 and 2002011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4549806 + ... + 4550245.

It is an arithmetic number, because the mean of its divisors is an integer number (191101092).

Almost surely, 2^2002011220 is an apocalyptic number.

2002011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2002011220 is an abundant number, since it is smaller than the sum of its proper divisors (2584414988).

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

2002011220 is a wasteful number, since it uses less digits than its factorization.

2002011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100071 (or 9100069 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2002011220 is about 44743.8400229574. The cubic root of 2002011220 is about 1260.3432381432.

Adding to 2002011220 its reverse (221102002), we get a palindrome (2223113222).

The spelling of 2002011220 in words is "two billion, two million, eleven thousand, two hundred twenty".