121065105 has 16 divisors (see below), whose sum is σ = 221376384. Its totient is φ = 55344000.

The previous prime is 121065089. The next prime is 121065121. The reversal of 121065105 is 501560121.

It is an interprime number because it is at equal distance from previous prime (121065089) and next prime (121065121).

It is not a de Polignac number, because 121065105 - 2⁴ = 121065089 is a prime.

It is a super-2 number, since 2×121065105² = 29313519297322050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576396 + ... + 576605.

It is an arithmetic number, because the mean of its divisors is an integer number (13836024).

Almost surely, 2^121065105 is an apocalyptic number.

121065105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121065105 is a deficient number, since it is larger than the sum of its proper divisors (100311279).

121065105 is a wasteful number, since it uses less digits than its factorization.

121065105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153016.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 121065105 is about 11002.9589202178. The cubic root of 121065105 is about 494.6974377921.

The spelling of 121065105 in words is "one hundred twenty-one million, sixty-five thousand, one hundred five".