14221221997 has 2 divisors, whose sum is σ = 14221221998. Its totient is φ = 14221221996.

The previous prime is 14221221961. The next prime is 14221222003. The reversal of 14221221997 is 79912212241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12040892361 + 2180329636 = 109731^2 + 46694^2 .

It is a cyclic number.

It is not a de Polignac number, because 14221221997 - 2¹⁹ = 14220697709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14221221097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7110610998 + 7110610999.

It is an arithmetic number, because the mean of its divisors is an integer number (7110610999).

Almost surely, 2^14221221997 is an apocalyptic number.

It is an amenable number.

14221221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

14221221997 is an equidigital number, since it uses as much as digits as its factorization.

14221221997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The spelling of 14221221997 in words is "fourteen billion, two hundred twenty-one million, two hundred twenty-one thousand, nine hundred ninety-seven".