505200603121 has 2 divisors, whose sum is σ = 505200603122. Its totient is φ = 505200603120.

The previous prime is 505200603101. The next prime is 505200603203. The reversal of 505200603121 is 121306002505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458551082896 + 46649520225 = 677164^2 + 215985^2 .

It is a cyclic number.

It is not a de Polignac number, because 505200603121 - 2¹⁹ = 505200078833 is a prime.

It is not a weakly prime, because it can be changed into another prime (505200603101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252600301560 + 252600301561.

It is an arithmetic number, because the mean of its divisors is an integer number (252600301561).

Almost surely, 2^505200603121 is an apocalyptic number.

It is an amenable number.

505200603121 is a deficient number, since it is larger than the sum of its proper divisors (1).

505200603121 is an equidigital number, since it uses as much as digits as its factorization.

505200603121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 505200603121 its reverse (121306002505), we get a palindrome (626506605626).

The spelling of 505200603121 in words is "five hundred five billion, two hundred million, six hundred three thousand, one hundred twenty-one".