243121223306 has 16 divisors (see below), whose sum is σ = 392769216000. Its totient is φ = 112199814768.

The previous prime is 243121223299. The next prime is 243121223309. The reversal of 243121223306 is 603322121342.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (243121223309) 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, 113786 + ... + 706533.

It is an arithmetic number, because the mean of its divisors is an integer number (24548076000).

Almost surely, 2^243121223306 is an apocalyptic number.

243121223306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

243121223306 is a deficient number, since it is larger than the sum of its proper divisors (149647992694).

243121223306 is a wasteful number, since it uses less digits than its factorization.

243121223306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831733.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 243121223306 its reverse (603322121342), we get a palindrome (846443344648).

The spelling of 243121223306 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred twenty-three thousand, three hundred six".