243121110259 has 2 divisors, whose sum is σ = 243121110260. Its totient is φ = 243121110258.

The previous prime is 243121110181. The next prime is 243121110283. The reversal of 243121110259 is 952011121342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243121110259 - 2¹⁵ = 243121077491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243121110259.

It is not a weakly prime, because it can be changed into another prime (243121110059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560555129 + 121560555130.

It is an arithmetic number, because the mean of its divisors is an integer number (121560555130).

Almost surely, 2^243121110259 is an apocalyptic number.

243121110259 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121110259 is an equidigital number, since it uses as much as digits as its factorization.

243121110259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 243121110259 in words is "two hundred forty-three billion, one hundred twenty-one million, one hundred ten thousand, two hundred fifty-nine".