211228100 has 36 divisors (see below), whose sum is σ = 459085200. Its totient is φ = 84358560.

The previous prime is 211228097. The next prime is 211228117. The reversal of 211228100 is 1822112.

It is a happy number.

It is a super-2 number, since 2×211228100² = 89234620459220000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84671 + ... + 87129.

Almost surely, 2^211228100 is an apocalyptic number.

211228100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211228100 is an abundant number, since it is smaller than the sum of its proper divisors (247857100).

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

211228100 is a wasteful number, since it uses less digits than its factorization.

211228100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332 (or 3325 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 211228100 is about 14533.6884513189. The cubic root of 211228100 is about 595.5486312704.

The spelling of 211228100 in words is "two hundred eleven million, two hundred twenty-eight thousand, one hundred".