243121241111 has 16 divisors (see below), whose sum is σ = 287194920960. Its totient is φ = 201400849440.

The previous prime is 243121241081. The next prime is 243121241123. The reversal of 243121241111 is 111142121342.

It is not a de Polignac number, because 243121241111 - 2¹⁸ = 243120978967 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 (243121241131) 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, 575741 + ... + 904278.

It is an arithmetic number, because the mean of its divisors is an integer number (17949682560).

Almost surely, 2^243121241111 is an apocalyptic number.

243121241111 is a deficient number, since it is larger than the sum of its proper divisors (44073679849).

243121241111 is a wasteful number, since it uses less digits than its factorization.

243121241111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480814.

The product of its digits is 384, while the sum is 23.

Adding to 243121241111 its reverse (111142121342), we get a palindrome (354263362453).

The spelling of 243121241111 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, one hundred eleven".