2100002220 has 48 divisors (see below), whose sum is σ = 6533341920. Its totient is φ = 560000448.

The previous prime is 2100002153. The next prime is 2100002243. The reversal of 2100002220 is 222000012.

It is a Harshad number since it is a multiple of its sum of digits (9).

2100002220 is a modest number, since divided by 2220 gives 2100 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1943907 + ... + 1944986.

It is an arithmetic number, because the mean of its divisors is an integer number (136111290).

Almost surely, 2^2100002220 is an apocalyptic number.

2100002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100002220 is an abundant number, since it is smaller than the sum of its proper divisors (4433339700).

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

2100002220 is a wasteful number, since it uses less digits than its factorization.

2100002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888911 (or 3888903 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2100002220 is about 45825.7811717378. The cubic root of 2100002220 is about 1280.5796162390.

Adding to 2100002220 its reverse (222000012), we get a palindrome (2322002232).

The spelling of 2100002220 in words is "two billion, one hundred million, two thousand, two hundred twenty".