16220721211 has 8 divisors (see below), whose sum is σ = 17076962880. Its totient is φ = 15364731528.

The previous prime is 16220721197. The next prime is 16220721217. The reversal of 16220721211 is 11212702261.

16220721211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16220721211 - 2¹⁵ = 16220688443 is a prime.

It is a super-2 number, since 2×16220721211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16220721217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77160 + ... + 195946.

It is an arithmetic number, because the mean of its divisors is an integer number (2134620360).

Almost surely, 2^16220721211 is an apocalyptic number.

16220721211 is a deficient number, since it is larger than the sum of its proper divisors (856241669).

16220721211 is a wasteful number, since it uses less digits than its factorization.

16220721211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125993.

The product of its (nonzero) digits is 672, while the sum is 25.

The spelling of 16220721211 in words is "sixteen billion, two hundred twenty million, seven hundred twenty-one thousand, two hundred eleven".