243142012129 has 2 divisors, whose sum is σ = 243142012130. Its totient is φ = 243142012128.

The previous prime is 243142012109. The next prime is 243142012153. The reversal of 243142012129 is 921210241342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203263919104 + 39878093025 = 450848^2 + 199695^2 .

It is a cyclic number.

It is not a de Polignac number, because 243142012129 - 2²³ = 243133623521 is a prime.

It is a super-2 number, since 2×243142012129² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243142012129.

It is not a weakly prime, because it can be changed into another prime (243142012109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121571006064 + 121571006065.

It is an arithmetic number, because the mean of its divisors is an integer number (121571006065).

Almost surely, 2^243142012129 is an apocalyptic number.

It is an amenable number.

243142012129 is a deficient number, since it is larger than the sum of its proper divisors (1).

243142012129 is an equidigital number, since it uses as much as digits as its factorization.

243142012129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 243142012129 in words is "two hundred forty-three billion, one hundred forty-two million, twelve thousand, one hundred twenty-nine".