102121225 has 12 divisors (see below), whose sum is σ = 126915984. Its totient is φ = 81512720.

The previous prime is 102121213. The next prime is 102121231. The reversal of 102121225 is 522121201.

It is a happy number.

It is not a de Polignac number, because 102121225 - 2¹⁵ = 102088457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121199 and 102121208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7302 + ... + 16048.

It is an arithmetic number, because the mean of its divisors is an integer number (10576332).

Almost surely, 2^102121225 is an apocalyptic number.

It is an amenable number.

102121225 is a deficient number, since it is larger than the sum of its proper divisors (24794759).

102121225 is an equidigital number, since it uses as much as digits as its factorization.

102121225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9224 (or 9219 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 102121225 is about 10105.5046880401. The cubic root of 102121225 is about 467.4178985910.

Adding to 102121225 its reverse (522121201), we get a palindrome (624242426).

The spelling of 102121225 in words is "one hundred two million, one hundred twenty-one thousand, two hundred twenty-five".