243262121041 has 2 divisors, whose sum is σ = 243262121042. Its totient is φ = 243262121040.

The previous prime is 243262121033. The next prime is 243262121059. The reversal of 243262121041 is 140121262342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202054745025 + 41207376016 = 449505^2 + 202996^2 .

It is a cyclic number.

It is not a de Polignac number, because 243262121041 - 2³ = 243262121033 is a prime.

It is a super-2 number, since 2×243262121041² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243262128041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121631060520 + 121631060521.

It is an arithmetic number, because the mean of its divisors is an integer number (121631060521).

Almost surely, 2^243262121041 is an apocalyptic number.

It is an amenable number.

243262121041 is a deficient number, since it is larger than the sum of its proper divisors (1).

243262121041 is an equidigital number, since it uses as much as digits as its factorization.

243262121041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 243262121041 its reverse (140121262342), we get a palindrome (383383383383).

The spelling of 243262121041 in words is "two hundred forty-three billion, two hundred sixty-two million, one hundred twenty-one thousand, forty-one".