16506022212011 has 4 divisors (see below), whose sum is σ = 16524843218832. Its totient is φ = 16487201205192.

The previous prime is 16506022211999. The next prime is 16506022212061. The reversal of 16506022212011 is 11021222060561.

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 16506022212011 - 2³⁴ = 16488842342827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16506022212061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9410502095 + ... + 9410503848.

It is an arithmetic number, because the mean of its divisors is an integer number (4131210804708).

Almost surely, 2^{16506022212011} is an apocalyptic number.

16506022212011 is a deficient number, since it is larger than the sum of its proper divisors (18821006821).

16506022212011 is an equidigital number, since it uses as much as digits as its factorization.

16506022212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18821006820.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 16506022212011 its reverse (11021222060561), we get a palindrome (27527244272572).

The spelling of 16506022212011 in words is "sixteen trillion, five hundred six billion, twenty-two million, two hundred twelve thousand, eleven".