212121201 has 8 divisors (see below), whose sum is σ = 283104640. Its totient is φ = 141275952.

The previous prime is 212121197. The next prime is 212121209. The reversal of 212121201 is 102121212.

212121201 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 212121201 - 2² = 212121197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121209) 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, 30910 + ... + 37143.

It is an arithmetic number, because the mean of its divisors is an integer number (35388080).

Almost surely, 2^212121201 is an apocalyptic number.

It is an amenable number.

212121201 is a deficient number, since it is larger than the sum of its proper divisors (70983439).

212121201 is a wasteful number, since it uses less digits than its factorization.

212121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69095.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 212121201 is about 14564.3812432935. The cubic root of 212121201 is about 596.3868044848.

Adding to 212121201 its reverse (102121212), we get a palindrome (314242413).

The spelling of 212121201 in words is "two hundred twelve million, one hundred twenty-one thousand, two hundred one".