505225356121 has 4 divisors (see below), whose sum is σ = 506724541492. Its totient is φ = 503726170752.

The previous prime is 505225356091. The next prime is 505225356127. The reversal of 505225356121 is 121653522505.

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 360677118096 + 144548238025 = 600564^2 + 380195^2 .

It is a cyclic number.

It is not a de Polignac number, because 505225356121 - 2¹³ = 505225347929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505225356127) 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, 749592180 + ... + 749592853.

It is an arithmetic number, because the mean of its divisors is an integer number (126681135373).

Almost surely, 2^505225356121 is an apocalyptic number.

It is an amenable number.

505225356121 is a deficient number, since it is larger than the sum of its proper divisors (1499185371).

505225356121 is a wasteful number, since it uses less digits than its factorization.

505225356121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499185370.

The product of its (nonzero) digits is 90000, while the sum is 37.

Adding to 505225356121 its reverse (121653522505), we get a palindrome (626878878626).

The spelling of 505225356121 in words is "five hundred five billion, two hundred twenty-five million, three hundred fifty-six thousand, one hundred twenty-one".