21201100210212 has 24 divisors (see below), whose sum is σ = 53274559502976. Its totient is φ = 6523415449248.

The previous prime is 21201100210201. The next prime is 21201100210217. The reversal of 21201100210212 is 21201200110212.

It is a junction number, because it is equal to n+sod(n) for n = 21201100210191 and 21201100210200.

It is not an unprimeable number, because it can be changed into a prime (21201100210217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67952244108 + ... + 67952244419.

It is an arithmetic number, because the mean of its divisors is an integer number (2219773312624).

Almost surely, 2^{21201100210212} is an apocalyptic number.

It is an amenable number.

21201100210212 is an abundant number, since it is smaller than the sum of its proper divisors (32073459292764).

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

21201100210212 is a wasteful number, since it uses less digits than its factorization.

21201100210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135904488547 (or 135904488545 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201100210212 its reverse (21201200110212), we get a palindrome (42402300320424).

The spelling of 21201100210212 in words is "twenty-one trillion, two hundred one billion, one hundred million, two hundred ten thousand, two hundred twelve".