21201200212 has 12 divisors (see below), whose sum is σ = 37205451360. Its totient is φ = 10571071256.

The previous prime is 21201200177. The next prime is 21201200221. The reversal of 21201200212 is 21200210212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21201200192 and 21201200201.

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 3 ways as a sum of consecutive naturals, for example, 7380598 + ... + 7383469.

It is an arithmetic number, because the mean of its divisors is an integer number (3100454280).

Almost surely, 2^21201200212 is an apocalyptic number.

It is an amenable number.

21201200212 is a deficient number, since it is larger than the sum of its proper divisors (16004251148).

21201200212 is a wasteful number, since it uses less digits than its factorization.

21201200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14764430 (or 14764428 counting only the distinct ones).

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

Adding to 21201200212 its reverse (21200210212), we get a palindrome (42401410424).

The spelling of 21201200212 in words is "twenty-one billion, two hundred one million, two hundred thousand, two hundred twelve".