21200210112212 has 24 divisors (see below), whose sum is σ = 37570639075200. Its totient is φ = 10465746422976.

The previous prime is 21200210112187. The next prime is 21200210112223. The reversal of 21200210112212 is 21221101200212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18849248 + ... + 19942280.

It is an arithmetic number, because the mean of its divisors is an integer number (1565443294800).

Almost surely, 2^{21200210112212} is an apocalyptic number.

It is an amenable number.

21200210112212 is a deficient number, since it is larger than the sum of its proper divisors (16370428962988).

21200210112212 is a wasteful number, since it uses less digits than its factorization.

21200210112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154495 (or 1154493 counting only the distinct ones).

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

Adding to 21200210112212 its reverse (21221101200212), we get a palindrome (42421311312424).

The spelling of 21200210112212 in words is "twenty-one trillion, two hundred billion, two hundred ten million, one hundred twelve thousand, two hundred twelve".