2101212200 has 96 divisors (see below), whose sum is σ = 5023339200. Its totient is φ = 816936960.

The previous prime is 2101212143. The next prime is 2101212229. The reversal of 2101212200 is 22121012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2261336 + ... + 2262264.

It is an arithmetic number, because the mean of its divisors is an integer number (52326450).

Almost surely, 2^2101212200 is an apocalyptic number.

2101212200 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 2101212200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2511669600).

2101212200 is an abundant number, since it is smaller than the sum of its proper divisors (2922127000).

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

2101212200 is a wasteful number, since it uses less digits than its factorization.

2101212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2101212200 is about 45838.9812277716. The cubic root of 2101212200 is about 1280.8255172849.

Adding to 2101212200 its reverse (22121012), we get a palindrome (2123333212).

The spelling of 2101212200 in words is "two billion, one hundred one million, two hundred twelve thousand, two hundred".