102025004521 has 4 divisors (see below), whose sum is σ = 111300004944. Its totient is φ = 92750004100.

The previous prime is 102025004507. The next prime is 102025004531. The reversal of 102025004521 is 125400520201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102025004521 - 2⁹ = 102025004009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102025004492 and 102025004501.

It is not an unprimeable number, because it can be changed into a prime (102025004531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4637500195 + ... + 4637500216.

It is an arithmetic number, because the mean of its divisors is an integer number (27825001236).

Almost surely, 2^102025004521 is an apocalyptic number.

102025004521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102025004521 is a deficient number, since it is larger than the sum of its proper divisors (9275000423).

102025004521 is an equidigital number, since it uses as much as digits as its factorization.

102025004521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9275000422.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 102025004521 its reverse (125400520201), we get a palindrome (227425524722).

The spelling of 102025004521 in words is "one hundred two billion, twenty-five million, four thousand, five hundred twenty-one".