505717012123 has 2 divisors, whose sum is σ = 505717012124. Its totient is φ = 505717012122.

The previous prime is 505717012049. The next prime is 505717012153. The reversal of 505717012123 is 321210717505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505717012123 - 2¹⁷ = 505716881051 is a prime.

It is a super-2 number, since 2×505717012123² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505717012153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252858506061 + 252858506062.

It is an arithmetic number, because the mean of its divisors is an integer number (252858506062).

Almost surely, 2^505717012123 is an apocalyptic number.

505717012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

505717012123 is an equidigital number, since it uses as much as digits as its factorization.

505717012123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14700, while the sum is 34.

Adding to 505717012123 its reverse (321210717505), we get a palindrome (826927729628).

The spelling of 505717012123 in words is "five hundred five billion, seven hundred seventeen million, twelve thousand, one hundred twenty-three".