243121245201 has 8 divisors (see below), whose sum is σ = 360179622560. Its totient is φ = 162080830116.

The previous prime is 243121245181. The next prime is 243121245233. The reversal of 243121245201 is 102542121342.

243121245201 is a `hidden beast` number, since 2 + 4 + 3 + 12 + 124 + 520 + 1 = 666.

It is not a de Polignac number, because 243121245201 - 2²³ = 243112856593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9004490563 = 243121245201 / (2 + 4 + 3 + 1 + 2 + 1 + 2 + 4 + 5 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121245281) 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, 4502245255 + ... + 4502245308.

It is an arithmetic number, because the mean of its divisors is an integer number (45022452820).

Almost surely, 2^243121245201 is an apocalyptic number.

It is an amenable number.

243121245201 is a deficient number, since it is larger than the sum of its proper divisors (117058377359).

243121245201 is an equidigital number, since it uses as much as digits as its factorization.

243121245201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9004490572 (or 9004490566 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 243121245201 its reverse (102542121342), we get a palindrome (345663366543).

The spelling of 243121245201 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, two hundred one".