1212300505225 has 12 divisors (see below), whose sum is σ = 1591679252124. Its totient is φ = 912790968320.

The previous prime is 1212300505219. The next prime is 1212300505243. The reversal of 1212300505225 is 5225050032121.

It can be written as a sum of positive squares in 6 ways, for example, as 21139996816 + 1191160508409 = 145396^2 + 1091403^2 .

It is not a de Polignac number, because 1212300505225 - 2³⁹ = 662544691337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212300505193 and 1212300505202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1426235464 + ... + 1426236313.

It is an arithmetic number, because the mean of its divisors is an integer number (132639937677).

Almost surely, 2^{1212300505225} is an apocalyptic number.

It is an amenable number.

1212300505225 is a deficient number, since it is larger than the sum of its proper divisors (379378746899).

1212300505225 is a wasteful number, since it uses less digits than its factorization.

1212300505225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852471804 (or 2852471799 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 1212300505225 its reverse (5225050032121), we get a palindrome (6437350537346).

The spelling of 1212300505225 in words is "one trillion, two hundred twelve billion, three hundred million, five hundred five thousand, two hundred twenty-five".