121115105 has 8 divisors (see below), whose sum is σ = 145905192. Its totient is φ = 96514048.

The previous prime is 121115083. The next prime is 121115129. The reversal of 121115105 is 501511121.

It can be written as a sum of positive squares in 4 ways, for example, as 89889361 + 31225744 = 9481^2 + 5588^2 .

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 121115105 - 2⁶ = 121115041 is a prime.

It is a super-2 number, since 2×121115105² = 29337737318322050, which contains 22 as substring.

It is a Duffinian number.

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, 45842 + ... + 48411.

It is an arithmetic number, because the mean of its divisors is an integer number (18238149).

Almost surely, 2^121115105 is an apocalyptic number.

It is an amenable number.

121115105 is a deficient number, since it is larger than the sum of its proper divisors (24790087).

121115105 is an equidigital number, since it uses as much as digits as its factorization.

121115105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94515.

The product of its (nonzero) digits is 50, while the sum is 17.

The square root of 121115105 is about 11005.2308017597. The cubic root of 121115105 is about 494.7655319180.

Adding to 121115105 its reverse (501511121), we get a palindrome (622626226).

The spelling of 121115105 in words is "one hundred twenty-one million, one hundred fifteen thousand, one hundred five".