21200212 has 24 divisors (see below), whose sum is σ = 41241312. Its totient is φ = 9453600.

The previous prime is 21200209. The next prime is 21200233.

21200212 is nontrivially palindromic in base 10.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2214 + ... + 6877.

It is an arithmetic number, because the mean of its divisors is an integer number (1718388).

Almost surely, 2^21200212 is an apocalyptic number.

21200212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21200212 is a deficient number, since it is larger than the sum of its proper divisors (20041100).

21200212 is a wasteful number, since it uses less digits than its factorization.

21200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9159 (or 9157 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 21200212 is about 4604.3687949598. The cubic root of 21200212 is about 276.7664232775.

It can be divided in two parts, 21200 and 212, that multiplied together give a square (4494400 = 2120²).

The spelling of 21200212 in words is "twenty-one million, two hundred thousand, two hundred twelve".