243121232227 has 2 divisors, whose sum is σ = 243121232228. Its totient is φ = 243121232226.

The previous prime is 243121232171. The next prime is 243121232267. The reversal of 243121232227 is 722232121342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243121232227 - 2¹⁹ = 243120707939 is a prime.

It is not a weakly prime, because it can be changed into another prime (243121232267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560616113 + 121560616114.

It is an arithmetic number, because the mean of its divisors is an integer number (121560616114).

Almost surely, 2^243121232227 is an apocalyptic number.

243121232227 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121232227 is an equidigital number, since it uses as much as digits as its factorization.

243121232227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

Adding to 243121232227 its reverse (722232121342), we get a palindrome (965353353569).

The spelling of 243121232227 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty-seven".