5125312112121 has 32 divisors (see below), whose sum is σ = 7992914832000. Its totient is φ = 3236947951104.

The previous prime is 5125312112069. The next prime is 5125312112143. The reversal of 5125312112121 is 1212112135215.

5125312112121 is a `hidden beast` number, since 5 + 1 + 2 + 531 + 2 + 1 + 1 + 2 + 121 = 666.

It is not a de Polignac number, because 5125312112121 - 2⁶ = 5125312112057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (5125312112021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21225361 + ... + 21465473.

It is an arithmetic number, because the mean of its divisors is an integer number (249778588500).

Almost surely, 2^{5125312112121} is an apocalyptic number.

It is an amenable number.

5125312112121 is a deficient number, since it is larger than the sum of its proper divisors (2867602719879).

5125312112121 is a wasteful number, since it uses less digits than its factorization.

5125312112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281750 (or 281744 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

Adding to 5125312112121 its reverse (1212112135215), we get a palindrome (6337424247336).

The spelling of 5125312112121 in words is "five trillion, one hundred twenty-five billion, three hundred twelve million, one hundred twelve thousand, one hundred twenty-one".