243121331212 has 6 divisors (see below), whose sum is σ = 425462329628. Its totient is φ = 121560665604.

The previous prime is 243121331183. The next prime is 243121331213. The reversal of 243121331212 is 212133121342.

It is not an unprimeable number, because it can be changed into a prime (243121331213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30390166398 + ... + 30390166405.

Almost surely, 2^243121331212 is an apocalyptic number.

It is an amenable number.

243121331212 is a deficient number, since it is larger than the sum of its proper divisors (182340998416).

243121331212 is a wasteful number, since it uses less digits than its factorization.

243121331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60780332807 (or 60780332805 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 243121331212 its reverse (212133121342), we get a palindrome (455254452554).

The spelling of 243121331212 in words is "two hundred forty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred twelve".