121205525 has 24 divisors (see below), whose sum is σ = 176417280. Its totient is φ = 80861760.

The previous prime is 121205509. The next prime is 121205533. The reversal of 121205525 is 525502121.

It is not a de Polignac number, because 121205525 - 2⁴ = 121205509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121205525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2885 + ... + 15834.

It is an arithmetic number, because the mean of its divisors is an integer number (7350720).

Almost surely, 2^121205525 is an apocalyptic number.

It is an amenable number.

121205525 is a deficient number, since it is larger than the sum of its proper divisors (55211755).

121205525 is a wasteful number, since it uses less digits than its factorization.

121205525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18773 (or 18768 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 121205525 is about 11009.3380818285. The cubic root of 121205525 is about 494.8886257608. Note that the first 3 decimals are identical.

Adding to 121205525 its reverse (525502121), we get a palindrome (646707646).

The spelling of 121205525 in words is "one hundred twenty-one million, two hundred five thousand, five hundred twenty-five".