505214431121 has 4 divisors (see below), whose sum is σ = 514746778932. Its totient is φ = 495682083312.

The previous prime is 505214431087. The next prime is 505214431153. The reversal of 505214431121 is 121134412505.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 263456358400 + 241758072721 = 513280^2 + 491689^2 .

It is a cyclic number.

It is not a de Polignac number, because 505214431121 - 2³⁸ = 230336524177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505214431621) 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, 4766173826 + ... + 4766173931.

It is an arithmetic number, because the mean of its divisors is an integer number (128686694733).

Almost surely, 2^505214431121 is an apocalyptic number.

It is an amenable number.

505214431121 is a deficient number, since it is larger than the sum of its proper divisors (9532347811).

505214431121 is an equidigital number, since it uses as much as digits as its factorization.

505214431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9532347810.

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 505214431121 its reverse (121134412505), we get a palindrome (626348843626).

The spelling of 505214431121 in words is "five hundred five billion, two hundred fourteen million, four hundred thirty-one thousand, one hundred twenty-one".