121105 has 8 divisors (see below), whose sum is σ = 148392. Its totient is φ = 94848.

The previous prime is 121081. The next prime is 121123. The reversal of 121105 is 501121.

It is a happy number.

It is a Cunningham number, because it is equal to 348²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 43264 + 77841 = 208^2 + 279^2 .

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 121105 - 2⁷ = 120977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121091 and 121100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37 + ... + 493.

It is an arithmetic number, because the mean of its divisors is an integer number (18549).

2¹²¹¹⁰⁵ is an apocalyptic number.

It is an amenable number.

121105 is a deficient number, since it is larger than the sum of its proper divisors (27287).

121105 is an equidigital number, since it uses as much as digits as its factorization.

121105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 121105 is about 348.0014367786. The cubic root of 121105 is about 49.4751771606.

Adding to 121105 its reverse (501121), we get a palindrome (622226).

The spelling of 121105 in words is "one hundred twenty-one thousand, one hundred five".