210002001212221 has 16 divisors (see below), whose sum is σ = 211632629529600. Its totient is φ = 208378595230848.

The previous prime is 210002001212183. The next prime is 210002001212239. The reversal of 210002001212221 is 122212100200012.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210002001212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210002001212195 and 210002001212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002001212621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103638175 + ... + 105645043.

It is an arithmetic number, because the mean of its divisors is an integer number (13227039345600).

Almost surely, 2^{210002001212221} is an apocalyptic number.

It is an amenable number.

210002001212221 is a deficient number, since it is larger than the sum of its proper divisors (1630628317379).

210002001212221 is a wasteful number, since it uses less digits than its factorization.

210002001212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008668.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210002001212221 its reverse (122212100200012), we get a palindrome (332214101412233).

The spelling of 210002001212221 in words is "two hundred ten trillion, two billion, one million, two hundred twelve thousand, two hundred twenty-one".