505011101011 has 4 divisors (see below), whose sum is σ = 510011211024. Its totient is φ = 500010991000.

The previous prime is 505011100963. The next prime is 505011101041. The reversal of 505011101011 is 110101110505.

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

It is a cyclic number.

It is not a de Polignac number, because 505011101011 - 2⁹ = 505011100499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505011101041) 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, 2500054855 + ... + 2500055056.

It is an arithmetic number, because the mean of its divisors is an integer number (127502802756).

Almost surely, 2^505011101011 is an apocalyptic number.

505011101011 is a deficient number, since it is larger than the sum of its proper divisors (5000110013).

505011101011 is a wasteful number, since it uses less digits than its factorization.

505011101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000110012.

The product of its (nonzero) digits is 25, while the sum is 16.

Adding to 505011101011 its reverse (110101110505), we get a palindrome (615112211516).

The spelling of 505011101011 in words is "five hundred five billion, eleven million, one hundred one thousand, eleven".