16721226223 has 6 divisors (see below), whose sum is σ = 18106416744. Its totient is φ = 15434977896.

The previous prime is 16721226211. The next prime is 16721226229. The reversal of 16721226223 is 32262212761.

It is not a de Polignac number, because 16721226223 - 2⁵ = 16721226191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16721226229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49470915 + ... + 49471252.

It is an arithmetic number, because the mean of its divisors is an integer number (3017736124).

Almost surely, 2^16721226223 is an apocalyptic number.

16721226223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16721226223 is a deficient number, since it is larger than the sum of its proper divisors (1385190521).

16721226223 is an equidigital number, since it uses as much as digits as its factorization.

16721226223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98942193 (or 98942180 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

Adding to 16721226223 its reverse (32262212761), we get a palindrome (48983438984).

The spelling of 16721226223 in words is "sixteen billion, seven hundred twenty-one million, two hundred twenty-six thousand, two hundred twenty-three".