243121245231 has 8 divisors (see below), whose sum is σ = 324252807984. Its totient is φ = 162035256320.

The previous prime is 243121245181. The next prime is 243121245233. The reversal of 243121245231 is 132542121342.

It is a happy number.

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 243121245231 - 2¹⁸ = 243120983087 is a prime.

It is a super-2 number, since 2×243121245231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121245233) 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, 11381010 + ... + 11402351.

It is an arithmetic number, because the mean of its divisors is an integer number (40531600998).

Almost surely, 2^243121245231 is an apocalyptic number.

243121245231 is a deficient number, since it is larger than the sum of its proper divisors (81131562753).

243121245231 is a wasteful number, since it uses less digits than its factorization.

243121245231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22786921.

The product of its digits is 11520, while the sum is 30.

Adding to 243121245231 its reverse (132542121342), we get a palindrome (375663366573).

The spelling of 243121245231 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, two hundred thirty-one".