12225351513461 has 4 divisors (see below), whose sum is σ = 12226921087500. Its totient is φ = 12223781939424.

The previous prime is 12225351513451. The next prime is 12225351513503. The reversal of 12225351513461 is 16431515352221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9817286895025 + 2408064618436 = 3133255^2 + 1551794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12225351513461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225351513451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784775336 + ... + 784790913.

It is an arithmetic number, because the mean of its divisors is an integer number (3056730271875).

Almost surely, 2^{12225351513461} is an apocalyptic number.

It is an amenable number.

12225351513461 is a deficient number, since it is larger than the sum of its proper divisors (1569574039).

12225351513461 is an equidigital number, since it uses as much as digits as its factorization.

12225351513461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569574038.

The product of its digits is 216000, while the sum is 41.

Adding to 12225351513461 its reverse (16431515352221), we get a palindrome (28656866865682).

The spelling of 12225351513461 in words is "twelve trillion, two hundred twenty-five billion, three hundred fifty-one million, five hundred thirteen thousand, four hundred sixty-one".