121321525 has 12 divisors (see below), whose sum is σ = 162011332. Its totient is φ = 89591040.

The previous prime is 121321493. The next prime is 121321531. The reversal of 121321525 is 525123121.

It can be written as a sum of positive squares in 6 ways, for example, as 17648401 + 103673124 = 4201^2 + 10182^2 .

It is not a de Polignac number, because 121321525 - 2⁵ = 121321493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121321496 and 121321505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186324 + ... + 186973.

Almost surely, 2^121321525 is an apocalyptic number.

It is an amenable number.

121321525 is a deficient number, since it is larger than the sum of its proper divisors (40689807).

121321525 is a wasteful number, since it uses less digits than its factorization.

121321525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373320 (or 373315 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 121321525 is about 11014.6050768968. The cubic root of 121321525 is about 495.0464534849.

Adding to 121321525 its reverse (525123121), we get a palindrome (646444646).

The spelling of 121321525 in words is "one hundred twenty-one million, three hundred twenty-one thousand, five hundred twenty-five".