121615105 has 8 divisors (see below), whose sum is σ = 153619200. Its totient is φ = 92171376.

The previous prime is 121615097. The next prime is 121615121. The reversal of 121615105 is 501516121.

It is a happy number.

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 121615105 - 2³ = 121615097 is a prime.

It is a super-2 number, since 2×121615105² = 29580467528322050, which contains 22 as substring.

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, 639985 + ... + 640174.

It is an arithmetic number, because the mean of its divisors is an integer number (19202400).

Almost surely, 2^121615105 is an apocalyptic number.

It is an amenable number.

121615105 is a deficient number, since it is larger than the sum of its proper divisors (32004095).

121615105 is a wasteful number, since it uses less digits than its factorization.

121615105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280183.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 121615105 is about 11027.9238753267. The cubic root of 121615105 is about 495.4454446913.

The spelling of 121615105 in words is "one hundred twenty-one million, six hundred fifteen thousand, one hundred five".