2212122100 has 72 divisors (see below), whose sum is σ = 4929059520. Its totient is φ = 861262080.

The previous prime is 2212122097. The next prime is 2212122113. The reversal of 2212122100 is 12212122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1542984 + ... + 1544416.

It is an arithmetic number, because the mean of its divisors is an integer number (68459160).

Almost surely, 2^2212122100 is an apocalyptic number.

2212122100 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 2212122100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2464529760).

2212122100 is an abundant number, since it is smaller than the sum of its proper divisors (2716937420).

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

2212122100 is a wasteful number, since it uses less digits than its factorization.

2212122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2212122100 is about 47033.2021023447. The cubic root of 2212122100 is about 1302.9758454807.

Adding to 2212122100 its reverse (12212122), we get a palindrome (2224334222).

The spelling of 2212122100 in words is "two billion, two hundred twelve million, one hundred twenty-two thousand, one hundred".