1242205124239 has 2 divisors, whose sum is σ = 1242205124240. Its totient is φ = 1242205124238.

The previous prime is 1242205124233. The next prime is 1242205124351. The reversal of 1242205124239 is 9324215022421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242205124239 - 2³ = 1242205124231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242205124198 and 1242205124207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242205124231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621102562119 + 621102562120.

It is an arithmetic number, because the mean of its divisors is an integer number (621102562120).

Almost surely, 2^{1242205124239} is an apocalyptic number.

1242205124239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242205124239 is an equidigital number, since it uses as much as digits as its factorization.

1242205124239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 1242205124239 in words is "one trillion, two hundred forty-two billion, two hundred five million, one hundred twenty-four thousand, two hundred thirty-nine".