210212001221 has 8 divisors (see below), whose sum is σ = 224701694784. Its totient is φ = 196168144480.

The previous prime is 210212001217. The next prime is 210212001227. The reversal of 210212001221 is 122100212012.

210212001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210212001221 - 2² = 210212001217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210212001196 and 210212001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111458231 + ... + 111460116.

It is an arithmetic number, because the mean of its divisors is an integer number (28087711848).

Almost surely, 2^210212001221 is an apocalyptic number.

It is an amenable number.

210212001221 is a deficient number, since it is larger than the sum of its proper divisors (14489693563).

210212001221 is a wasteful number, since it uses less digits than its factorization.

210212001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222918411.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210212001221 its reverse (122100212012), we get a palindrome (332312213233).

The spelling of 210212001221 in words is "two hundred ten billion, two hundred twelve million, one thousand, two hundred twenty-one".