1224135204529 has 2 divisors, whose sum is σ = 1224135204530. Its totient is φ = 1224135204528.

The previous prime is 1224135204527. The next prime is 1224135204581. The reversal of 1224135204529 is 9254025314221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1051295456929 + 172839747600 = 1025327^2 + 415740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224135204529 - 2¹ = 1224135204527 is a prime.

It is a super-2 number, since 2×1224135204529² (a number of 25 digits) contains 22 as substring.

Together with 1224135204527, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1224135204491 and 1224135204500.

It is not a weakly prime, because it can be changed into another prime (1224135204527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612067602264 + 612067602265.

It is an arithmetic number, because the mean of its divisors is an integer number (612067602265).

Almost surely, 2^{1224135204529} is an apocalyptic number.

It is an amenable number.

1224135204529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224135204529 is an equidigital number, since it uses as much as digits as its factorization.

1224135204529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 1224135204529 in words is "one trillion, two hundred twenty-four billion, one hundred thirty-five million, two hundred four thousand, five hundred twenty-nine".