14042021221 has 2 divisors, whose sum is σ = 14042021222. Its totient is φ = 14042021220.

The previous prime is 14042021179. The next prime is 14042021261. The reversal of 14042021221 is 12212024041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10452813121 + 3589208100 = 102239^2 + 59910^2 .

It is a cyclic number.

It is not a de Polignac number, because 14042021221 - 2²¹ = 14039924069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14042021261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7021010610 + 7021010611.

It is an arithmetic number, because the mean of its divisors is an integer number (7021010611).

Almost surely, 2^14042021221 is an apocalyptic number.

It is an amenable number.

14042021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

14042021221 is an equidigital number, since it uses as much as digits as its factorization.

14042021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 14042021221 its reverse (12212024041), we get a palindrome (26254045262).

The spelling of 14042021221 in words is "fourteen billion, forty-two million, twenty-one thousand, two hundred twenty-one".