16134111221 has 8 divisors (see below), whose sum is σ = 16285097400. Its totient is φ = 15983179200.

The previous prime is 16134111211. The next prime is 16134111241. The reversal of 16134111221 is 12211143161.

It can be written as a sum of positive squares in 4 ways, for example, as 8374263121 + 7759848100 = 91511^2 + 88090^2 .

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 16134111221 - 2²² = 16129916917 is a prime.

It is a super-2 number, since 2×16134111221² (a number of 21 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 (16134111211) 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 7 ways as a sum of consecutive naturals, for example, 826271 + ... + 845571.

It is an arithmetic number, because the mean of its divisors is an integer number (2035637175).

Almost surely, 2^16134111221 is an apocalyptic number.

It is an amenable number.

16134111221 is a deficient number, since it is larger than the sum of its proper divisors (150986179).

16134111221 is a wasteful number, since it uses less digits than its factorization.

16134111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27079.

The product of its digits is 288, while the sum is 23.

Adding to 16134111221 its reverse (12211143161), we get a palindrome (28345254382).

The spelling of 16134111221 in words is "sixteen billion, one hundred thirty-four million, one hundred eleven thousand, two hundred twenty-one".