121145225 has 12 divisors (see below), whose sum is σ = 150759696. Its totient is φ = 96568080.

The previous prime is 121145203. The next prime is 121145237. The reversal of 121145225 is 522541121.

It is not a de Polignac number, because 121145225 - 2¹² = 121141129 is a prime.

It is a super-3 number, since 3×121145225³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121145225.

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, 1487 + ... + 15636.

It is an arithmetic number, because the mean of its divisors is an integer number (12563308).

Almost surely, 2^121145225 is an apocalyptic number.

It is an amenable number.

121145225 is a deficient number, since it is larger than the sum of its proper divisors (29614471).

121145225 is a wasteful number, since it uses less digits than its factorization.

121145225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17416 (or 17411 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 121145225 is about 11006.5991568695. The cubic root of 121145225 is about 494.8065427747.

Adding to 121145225 its reverse (522541121), we get a palindrome (643686346).

The spelling of 121145225 in words is "one hundred twenty-one million, one hundred forty-five thousand, two hundred twenty-five".