102302309506921 has 2 divisors, whose sum is σ = 102302309506922. Its totient is φ = 102302309506920.

The previous prime is 102302309506861. The next prime is 102302309506949. The reversal of 102302309506921 is 129605903203201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102017857951321 + 284451555600 = 10100389^2 + 533340^2 .

It is an emirp because it is prime and its reverse (129605903203201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102302309506921 - 2¹¹ = 102302309504873 is a prime.

It is not a weakly prime, because it can be changed into another prime (102302309506021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51151154753460 + 51151154753461.

It is an arithmetic number, because the mean of its divisors is an integer number (51151154753461).

Almost surely, 2^{102302309506921} is an apocalyptic number.

It is an amenable number.

102302309506921 is a deficient number, since it is larger than the sum of its proper divisors (1).

102302309506921 is an equidigital number, since it uses as much as digits as its factorization.

102302309506921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 102302309506921 in words is "one hundred two trillion, three hundred two billion, three hundred nine million, five hundred six thousand, nine hundred twenty-one".