121835561 has 8 divisors (see below), whose sum is σ = 125764800. Its totient is φ = 117939888.

The previous prime is 121835537. The next prime is 121835573. The reversal of 121835561 is 165538121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121835561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121835501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911 + ... + 15636.

It is an arithmetic number, because the mean of its divisors is an integer number (15720600).

Almost surely, 2^121835561 is an apocalyptic number.

It is an amenable number.

121835561 is a deficient number, since it is larger than the sum of its proper divisors (3929239).

121835561 is a wasteful number, since it uses less digits than its factorization.

121835561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16783.

The product of its digits is 7200, while the sum is 32.

The square root of 121835561 is about 11037.9147034211. The cubic root of 121835561 is about 495.7446344707.

The spelling of 121835561 in words is "one hundred twenty-one million, eight hundred thirty-five thousand, five hundred sixty-one".