16221463452601 has 16 divisors (see below), whose sum is σ = 18108636353280. Its totient is φ = 14403075840720.

The previous prime is 16221463452589. The next prime is 16221463452659. The reversal of 16221463452601 is 10625436412261.

16221463452601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16221463452601 - 2³¹ = 16219315968953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (16221463450601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8156806 + ... + 9948688.

It is an arithmetic number, because the mean of its divisors is an integer number (1131789772080).

Almost surely, 2^{16221463452601} is an apocalyptic number.

16221463452601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16221463452601 is a deficient number, since it is larger than the sum of its proper divisors (1887172900679).

16221463452601 is a wasteful number, since it uses less digits than its factorization.

16221463452601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811076.

The product of its (nonzero) digits is 414720, while the sum is 43.

Adding to 16221463452601 its reverse (10625436412261), we get a palindrome (26846899864862).

The spelling of 16221463452601 in words is "sixteen trillion, two hundred twenty-one billion, four hundred sixty-three million, four hundred fifty-two thousand, six hundred one".