243121043111 has 8 divisors (see below), whose sum is σ = 249765299520. Its totient is φ = 236480650848.

The previous prime is 243121043101. The next prime is 243121043147. The reversal of 243121043111 is 111340121342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243121043111 - 2²⁶ = 243053934247 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 (243121043101) 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, 838256 + ... + 1090373.

It is an arithmetic number, because the mean of its divisors is an integer number (31220662440).

Almost surely, 2^243121043111 is an apocalyptic number.

243121043111 is a deficient number, since it is larger than the sum of its proper divisors (6644256409).

243121043111 is a wasteful number, since it uses less digits than its factorization.

243121043111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932073.

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

Adding to 243121043111 its reverse (111340121342), we get a palindrome (354461164453).

The spelling of 243121043111 in words is "two hundred forty-three billion, one hundred twenty-one million, forty-three thousand, one hundred eleven".