2100220000 has 120 divisors (see below), whose sum is σ = 5205283776. Its totient is φ = 833856000.

The previous prime is 2100219959. The next prime is 2100220007. The reversal of 2100220000 is 220012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100220007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3459697 + ... + 3460303.

Almost surely, 2^2100220000 is an apocalyptic number.

2100220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2602641888).

2100220000 is an abundant number, since it is smaller than the sum of its proper divisors (3105063776).

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

2100220000 is an equidigital number, since it uses as much as digits as its factorization.

2100220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2100220000 is about 45828.1572834868. The cubic root of 2100220000 is about 1280.6238820635.

Adding to 2100220000 its reverse (220012), we get a palindrome (2100440012).

The spelling of 2100220000 in words is "two billion, one hundred million, two hundred twenty thousand".