243121254151 has 2 divisors, whose sum is σ = 243121254152. Its totient is φ = 243121254150.

The previous prime is 243121254149. The next prime is 243121254161. The reversal of 243121254151 is 151452121342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243121254151 - 2¹ = 243121254149 is a prime.

Together with 243121254149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243121254161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560627075 + 121560627076.

It is an arithmetic number, because the mean of its divisors is an integer number (121560627076).

Almost surely, 2^243121254151 is an apocalyptic number.

243121254151 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121254151 is an equidigital number, since it uses as much as digits as its factorization.

243121254151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

Adding to 243121254151 its reverse (151452121342), we get a palindrome (394573375493).

The spelling of 243121254151 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred fifty-four thousand, one hundred fifty-one".