212122100 has 36 divisors (see below), whose sum is σ = 480323424. Its totient is φ = 81158880.

The previous prime is 212122091. The next prime is 212122109. The reversal of 212122100 is 1221212.

It is a happy number.

212122100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212122091) and next prime (212122109).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43814 + ... + 48413.

Almost surely, 2^212122100 is an apocalyptic number.

212122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212122100 is an abundant number, since it is smaller than the sum of its proper divisors (268201324).

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

212122100 is a wasteful number, since it uses less digits than its factorization.

212122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92264 (or 92257 counting only the distinct ones).

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

The square root of 212122100 is about 14564.4121062266. The cubic root of 212122100 is about 596.3876470079.

Adding to 212122100 its reverse (1221212), we get a palindrome (213343312).

The spelling of 212122100 in words is "two hundred twelve million, one hundred twenty-two thousand, one hundred".