505213125123 has 8 divisors (see below), whose sum is σ = 769848571648. Its totient is φ = 288693214344.

The previous prime is 505213125103. The next prime is 505213125161. The reversal of 505213125123 is 321521312505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505213125123 - 2²² = 505208930819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505213125103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12028883911 + ... + 12028883952.

It is an arithmetic number, because the mean of its divisors is an integer number (96231071456).

Almost surely, 2^505213125123 is an apocalyptic number.

505213125123 is a deficient number, since it is larger than the sum of its proper divisors (264635446525).

505213125123 is a wasteful number, since it uses less digits than its factorization.

505213125123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24057767873.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 505213125123 its reverse (321521312505), we get a palindrome (826734437628).

The spelling of 505213125123 in words is "five hundred five billion, two hundred thirteen million, one hundred twenty-five thousand, one hundred twenty-three".