102221121697 has 2 divisors, whose sum is σ = 102221121698. Its totient is φ = 102221121696.

The previous prime is 102221121689. The next prime is 102221121707. The reversal of 102221121697 is 796121122201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78021896976 + 24199224721 = 279324^2 + 155561^2 .

It is a cyclic number.

It is not a de Polignac number, because 102221121697 - 2³ = 102221121689 is a prime.

It is not a weakly prime, because it can be changed into another prime (102221121097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110560848 + 51110560849.

It is an arithmetic number, because the mean of its divisors is an integer number (51110560849).

Almost surely, 2^102221121697 is an apocalyptic number.

It is an amenable number.

102221121697 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221121697 is an equidigital number, since it uses as much as digits as its factorization.

102221121697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

Adding to 102221121697 its reverse (796121122201), we get a palindrome (898342243898).

The spelling of 102221121697 in words is "one hundred two billion, two hundred twenty-one million, one hundred twenty-one thousand, six hundred ninety-seven".