1212443252425 has 12 divisors (see below), whose sum is σ = 1509279561756. Its totient is φ = 966180454400.

The previous prime is 1212443252369. The next prime is 1212443252431. The reversal of 1212443252425 is 5242523442121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 256452100921 + 955991151504 = 506411^2 + 977748^2 .

It is not a de Polignac number, because 1212443252425 - 2²³ = 1212434863817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94347136 + ... + 94359985.

It is an arithmetic number, because the mean of its divisors is an integer number (125773296813).

Almost surely, 2^{1212443252425} is an apocalyptic number.

It is an amenable number.

1212443252425 is a deficient number, since it is larger than the sum of its proper divisors (296836309331).

1212443252425 is a wasteful number, since it uses less digits than its factorization.

1212443252425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188707388 (or 188707383 counting only the distinct ones).

The product of its digits is 153600, while the sum is 37.

Adding to 1212443252425 its reverse (5242523442121), we get a palindrome (6454966694546).

The spelling of 1212443252425 in words is "one trillion, two hundred twelve billion, four hundred forty-three million, two hundred fifty-two thousand, four hundred twenty-five".