121212625 has 16 divisors (see below), whose sum is σ = 152787024. Its totient is φ = 96000000.

The previous prime is 121212617. The next prime is 121212659. The reversal of 121212625 is 526212121.

It can be written as a sum of positive squares in 8 ways, for example, as 3359889 + 117852736 = 1833^2 + 10856^2 .

It is not a de Polignac number, because 121212625 - 2³ = 121212617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121212596 and 121212605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7825 + ... + 17425.

It is an arithmetic number, because the mean of its divisors is an integer number (9549189).

Almost surely, 2^121212625 is an apocalyptic number.

It is an amenable number.

121212625 is a deficient number, since it is larger than the sum of its proper divisors (31574399).

121212625 is an equidigital number, since it uses as much as digits as its factorization.

121212625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717 (or 9707 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 121212625 is about 11009.6605306431. The cubic root of 121212625 is about 494.8982887984.

Adding to 121212625 its reverse (526212121), we get a palindrome (647424746).

The spelling of 121212625 in words is "one hundred twenty-one million, two hundred twelve thousand, six hundred twenty-five".