121305225 has 24 divisors (see below), whose sum is σ = 201316480. Its totient is φ = 64451520.

The previous prime is 121305199. The next prime is 121305229. The reversal of 121305225 is 522503121.

It is not a de Polignac number, because 121305225 - 2⁷ = 121305097 is a prime.

It is a super-2 number, since 2×121305225² = 29429915224601250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121305229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17856 + ... + 23694.

Almost surely, 2^121305225 is an apocalyptic number.

121305225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121305225 is a deficient number, since it is larger than the sum of its proper divisors (80011255).

121305225 is a wasteful number, since it uses less digits than its factorization.

121305225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129 (or 6124 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 121305225 is about 11013.8651253772. The cubic root of 121305225 is about 495.0242820452.

Adding to 121305225 its reverse (522503121), we get a palindrome (643808346).

The spelling of 121305225 in words is "one hundred twenty-one million, three hundred five thousand, two hundred twenty-five".