210002011121221 has 16 divisors (see below), whose sum is σ = 229725158169600. Its totient is φ = 190384242032880.

The previous prime is 210002011121207. The next prime is 210002011121233. The reversal of 210002011121221 is 122121110200012.

It is a cyclic number.

It is not a de Polignac number, because 210002011121221 - 2⁷ = 210002011121093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210002011121195 and 210002011121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210002011122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119702230 + ... + 121443928.

It is an arithmetic number, because the mean of its divisors is an integer number (14357822385600).

Almost surely, 2^{210002011121221} is an apocalyptic number.

It is an amenable number.

210002011121221 is a deficient number, since it is larger than the sum of its proper divisors (19723147048379).

210002011121221 is a wasteful number, since it uses less digits than its factorization.

210002011121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771944.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210002011121221 its reverse (122121110200012), we get a palindrome (332123121321233).

The spelling of 210002011121221 in words is "two hundred ten trillion, two billion, eleven million, one hundred twenty-one thousand, two hundred twenty-one".