102025664363221 has 2 divisors, whose sum is σ = 102025664363222. Its totient is φ = 102025664363220.

The previous prime is 102025664363219. The next prime is 102025664363269. The reversal of 102025664363221 is 122363466520201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83022821762596 + 19002842600625 = 9111686^2 + 4359225^2 .

It is a cyclic number.

It is not a de Polignac number, because 102025664363221 - 2¹ = 102025664363219 is a prime.

Together with 102025664363219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102025664363921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51012832181610 + 51012832181611.

It is an arithmetic number, because the mean of its divisors is an integer number (51012832181611).

Almost surely, 2^{102025664363221} is an apocalyptic number.

It is an amenable number.

102025664363221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102025664363221 is an equidigital number, since it uses as much as digits as its factorization.

102025664363221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 102025664363221 in words is "one hundred two trillion, twenty-five billion, six hundred sixty-four million, three hundred sixty-three thousand, two hundred twenty-one".