1213423125225 has 24 divisors (see below), whose sum is σ = 2006278673280. Its totient is φ = 647131331520.

The previous prime is 1213423125179. The next prime is 1213423125281. The reversal of 1213423125225 is 5225213243121.

It is not a de Polignac number, because 1213423125225 - 2⁹ = 1213423124713 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1484187 + ... + 2151663.

It is an arithmetic number, because the mean of its divisors is an integer number (83594944720).

Almost surely, 2^{1213423125225} is an apocalyptic number.

1213423125225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213423125225 is a deficient number, since it is larger than the sum of its proper divisors (792855548055).

1213423125225 is a wasteful number, since it uses less digits than its factorization.

1213423125225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691729 (or 691724 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

Adding to 1213423125225 its reverse (5225213243121), we get a palindrome (6438636368346).

The spelling of 1213423125225 in words is "one trillion, two hundred thirteen billion, four hundred twenty-three million, one hundred twenty-five thousand, two hundred twenty-five".