121121285 has 8 divisors (see below), whose sum is σ = 145887480. Its totient is φ = 96535744.

The previous prime is 121121269. The next prime is 121121293. The reversal of 121121285 is 582121121.

It can be written as a sum of positive squares in 4 ways, for example, as 516961 + 120604324 = 719^2 + 10982^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121121285 - 2⁴ = 121121269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121121285.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43682 + ... + 46371.

It is an arithmetic number, because the mean of its divisors is an integer number (18235935).

Almost surely, 2^121121285 is an apocalyptic number.

It is an amenable number.

121121285 is a deficient number, since it is larger than the sum of its proper divisors (24766195).

121121285 is an equidigital number, since it uses as much as digits as its factorization.

121121285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90327.

The product of its digits is 320, while the sum is 23.

The square root of 121121285 is about 11005.5115737525. The cubic root of 121121285 is about 494.7739470505.

The spelling of 121121285 in words is "one hundred twenty-one million, one hundred twenty-one thousand, two hundred eighty-five".