102403252921 has 2 divisors, whose sum is σ = 102403252922. Its totient is φ = 102403252920.

The previous prime is 102403252859. The next prime is 102403252943. The reversal of 102403252921 is 129252304201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100070362921 + 2332890000 = 316339^2 + 48300^2 .

It is an emirp because it is prime and its reverse (129252304201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102403252921 - 2⁷ = 102403252793 is a prime.

It is not a weakly prime, because it can be changed into another prime (102403252421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51201626460 + 51201626461.

It is an arithmetic number, because the mean of its divisors is an integer number (51201626461).

Almost surely, 2^102403252921 is an apocalyptic number.

It is an amenable number.

102403252921 is a deficient number, since it is larger than the sum of its proper divisors (1).

102403252921 is an equidigital number, since it uses as much as digits as its factorization.

102403252921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 102403252921 in words is "one hundred two billion, four hundred three million, two hundred fifty-two thousand, nine hundred twenty-one".