505123044505121 has 24 divisors (see below), whose sum is σ = 591215813338464. Its totient is φ = 430292683900800.

The previous prime is 505123044504989. The next prime is 505123044505141. The reversal of 505123044505121 is 121505440321505.

It is not a de Polignac number, because 505123044505121 - 2²² = 505123040310817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505123044505141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253657721 + ... + 255641321.

It is an arithmetic number, because the mean of its divisors is an integer number (24633992222436).

Almost surely, 2^{505123044505121} is an apocalyptic number.

It is an amenable number.

505123044505121 is a deficient number, since it is larger than the sum of its proper divisors (86092768833343).

505123044505121 is a wasteful number, since it uses less digits than its factorization.

505123044505121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015661 (or 2015654 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 38.

Adding to 505123044505121 its reverse (121505440321505), we get a palindrome (626628484826626).

The spelling of 505123044505121 in words is "five hundred five trillion, one hundred twenty-three billion, forty-four million, five hundred five thousand, one hundred twenty-one".