212301221 has 8 divisors (see below), whose sum is σ = 231717024. Its totient is φ = 192904720.

The previous prime is 212301197. The next prime is 212301263. The reversal of 212301221 is 122103212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212301221 - 2¹⁰ = 212300197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212301196 and 212301205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212301821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27806 + ... + 34608.

It is an arithmetic number, because the mean of its divisors is an integer number (28964628).

Almost surely, 2^212301221 is an apocalyptic number.

It is an amenable number.

212301221 is a deficient number, since it is larger than the sum of its proper divisors (19415803).

212301221 is a wasteful number, since it uses less digits than its factorization.

212301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212301221 is about 14570.5600784596. The cubic root of 212301221 is about 596.5554678009. Note that the first 3 decimals are identical.

Adding to 212301221 its reverse (122103212), we get a palindrome (334404433).

The spelling of 212301221 in words is "two hundred twelve million, three hundred one thousand, two hundred twenty-one".