2121211100 has 18 divisors (see below), whose sum is σ = 4603028304. Its totient is φ = 848484400.

The previous prime is 2121211069. The next prime is 2121211109. The reversal of 2121211100 is 11121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121211109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10605956 + ... + 10606155.

Almost surely, 2^2121211100 is an apocalyptic number.

2121211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121211100 is an abundant number, since it is smaller than the sum of its proper divisors (2481817204).

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

2121211100 is a wasteful number, since it uses less digits than its factorization.

2121211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21212125 (or 21212118 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2121211100 is about 46056.6075606964. The cubic root of 2121211100 is about 1284.8762365220.

Adding to 2121211100 its reverse (11121212), we get a palindrome (2132332312).

The spelling of 2121211100 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred".