243322121111 has 16 divisors (see below), whose sum is σ = 262120194048. Its totient is φ = 225210585600.

The previous prime is 243322121089. The next prime is 243322121131. The reversal of 243322121111 is 111121223342.

It is a de Polignac number, because none of the positive numbers 2^k-243322121111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243322121131) 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, 12058871 + ... + 12079031.

It is an arithmetic number, because the mean of its divisors is an integer number (16382512128).

Almost surely, 2^243322121111 is an apocalyptic number.

243322121111 is a deficient number, since it is larger than the sum of its proper divisors (18798072937).

243322121111 is a wasteful number, since it uses less digits than its factorization.

243322121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37142.

The product of its digits is 576, while the sum is 23.

Adding to 243322121111 its reverse (111121223342), we get a palindrome (354443344453).

The spelling of 243322121111 in words is "two hundred forty-three billion, three hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".