51225012123 has 4 divisors (see below), whose sum is σ = 68300016168. Its totient is φ = 34150008080.

The previous prime is 51225012109. The next prime is 51225012127. The reversal of 51225012123 is 32121052215.

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

It is a cyclic number.

It is not a de Polignac number, because 51225012123 - 2⁴ = 51225012107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51225012093 and 51225012102.

It is not an unprimeable number, because it can be changed into a prime (51225012127) 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, 8537502018 + ... + 8537502023.

It is an arithmetic number, because the mean of its divisors is an integer number (17075004042).

Almost surely, 2^51225012123 is an apocalyptic number.

51225012123 is a deficient number, since it is larger than the sum of its proper divisors (17075004045).

51225012123 is a wasteful number, since it uses less digits than its factorization.

51225012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17075004044.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 51225012123 its reverse (32121052215), we get a palindrome (83346064338).

The spelling of 51225012123 in words is "fifty-one billion, two hundred twenty-five million, twelve thousand, one hundred twenty-three".