505406240121 has 8 divisors (see below), whose sum is σ = 676817673280. Its totient is φ = 335466150192.

The previous prime is 505406240117. The next prime is 505406240137. The reversal of 505406240121 is 121042604505.

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

It is not a de Polignac number, because 505406240121 - 2² = 505406240117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505406240021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367835005 + ... + 367836378.

It is an arithmetic number, because the mean of its divisors is an integer number (84602209160).

Almost surely, 2^505406240121 is an apocalyptic number.

It is an amenable number.

505406240121 is a deficient number, since it is larger than the sum of its proper divisors (171411433159).

505406240121 is a wasteful number, since it uses less digits than its factorization.

505406240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735671615.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 505406240121 its reverse (121042604505), we get a palindrome (626448844626).

The spelling of 505406240121 in words is "five hundred five billion, four hundred six million, two hundred forty thousand, one hundred twenty-one".