243121241135 has 32 divisors (see below), whose sum is σ = 316616048640. Its totient is φ = 178720933248.

The previous prime is 243121241131. The next prime is 243121241141. The reversal of 243121241135 is 531142121342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243121241135 - 2² = 243121241131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243121241098 and 243121241107.

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 31 ways as a sum of consecutive naturals, for example, 25487 + ... + 697776.

It is an arithmetic number, because the mean of its divisors is an integer number (9894251520).

Almost surely, 2^243121241135 is an apocalyptic number.

243121241135 is a deficient number, since it is larger than the sum of its proper divisors (73494807505).

243121241135 is a wasteful number, since it uses less digits than its factorization.

243121241135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723407.

The product of its digits is 5760, while the sum is 29.

Adding to 243121241135 its reverse (531142121342), we get a palindrome (774263362477).

The spelling of 243121241135 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, one hundred thirty-five".