243212101 has 16 divisors (see below), whose sum is σ = 270720000. Its totient is φ = 216630000.

The previous prime is 243212093. The next prime is 243212107. The reversal of 243212101 is 101212342.

It is a cyclic number.

It is not a de Polignac number, because 243212101 - 2³ = 243212093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243212107) 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, 323476 + ... + 324226.

It is an arithmetic number, because the mean of its divisors is an integer number (16920000).

Almost surely, 2^243212101 is an apocalyptic number.

It is an amenable number.

243212101 is a deficient number, since it is larger than the sum of its proper divisors (27507899).

243212101 is a wasteful number, since it uses less digits than its factorization.

243212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 243212101 is about 15595.2589269944. The cubic root of 243212101 is about 624.2066529067.

Adding to 243212101 its reverse (101212342), we get a palindrome (344424443).

The spelling of 243212101 in words is "two hundred forty-three million, two hundred twelve thousand, one hundred one".