14122128221 has 2 divisors, whose sum is σ = 14122128222. Its totient is φ = 14122128220.

The previous prime is 14122128199. The next prime is 14122128277. The reversal of 14122128221 is 12282122141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13697191225 + 424936996 = 117035^2 + 20614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14122128221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14122128721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7061064110 + 7061064111.

It is an arithmetic number, because the mean of its divisors is an integer number (7061064111).

Almost surely, 2^14122128221 is an apocalyptic number.

It is an amenable number.

14122128221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14122128221 is an equidigital number, since it uses as much as digits as its factorization.

14122128221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1024, while the sum is 26.

The spelling of 14122128221 in words is "fourteen billion, one hundred twenty-two million, one hundred twenty-eight thousand, two hundred twenty-one".