2112222100 has 18 divisors (see below), whose sum is σ = 4583522174. Its totient is φ = 844888800.

The previous prime is 2112222031. The next prime is 2112222109. The reversal of 2112222100 is 12222112.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9265936 + 2102956164 = 3044^2 + 45858^2 .

It is a super-2 number, since 2×2112222100² = 8922964399456820000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112222109) 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, 10561011 + ... + 10561210.

Almost surely, 2^2112222100 is an apocalyptic number.

2112222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112222100 is an abundant number, since it is smaller than the sum of its proper divisors (2471300074).

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

2112222100 is a wasteful number, since it uses less digits than its factorization.

2112222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21122235 (or 21122228 counting only the distinct ones).

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

The square root of 2112222100 is about 45958.9175242411. The cubic root of 2112222100 is about 1283.0587047511.

Adding to 2112222100 its reverse (12222112), we get a palindrome (2124444212).

The spelling of 2112222100 in words is "two billion, one hundred twelve million, two hundred twenty-two thousand, one hundred".