16221322126453 has 4 divisors (see below), whose sum is σ = 16292781695520. Its totient is φ = 16149862557388.

The previous prime is 16221322126447. The next prime is 16221322126469. The reversal of 16221322126453 is 35462122312261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16221322126453 is a prime.

It is a super-2 number, since 2×16221322126453² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221322123453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35729784193 + ... + 35729784646.

It is an arithmetic number, because the mean of its divisors is an integer number (4073195423880).

Almost surely, 2^{16221322126453} is an apocalyptic number.

It is an amenable number.

16221322126453 is a deficient number, since it is larger than the sum of its proper divisors (71459569067).

16221322126453 is an equidigital number, since it uses as much as digits as its factorization.

16221322126453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71459569066.

The product of its digits is 207360, while the sum is 40.

The spelling of 16221322126453 in words is "sixteen trillion, two hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-six thousand, four hundred fifty-three".