121451105 has 4 divisors (see below), whose sum is σ = 145741332. Its totient is φ = 97160880.

The previous prime is 121451069. The next prime is 121451107. The reversal of 121451105 is 501154121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93392896 + 28058209 = 9664^2 + 5297^2 .

It is not a de Polignac number, because 121451105 - 2¹⁴ = 121434721 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 (121451107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12145106 + ... + 12145115.

It is an arithmetic number, because the mean of its divisors is an integer number (36435333).

Almost surely, 2^121451105 is an apocalyptic number.

It is an amenable number.

121451105 is a deficient number, since it is larger than the sum of its proper divisors (24290227).

121451105 is an equidigital number, since it uses as much as digits as its factorization.

121451105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24290226.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 121451105 is about 11020.4856971007. The cubic root of 121451105 is about 495.2226390236. Note that the first 3 decimals are identical.

The spelling of 121451105 in words is "one hundred twenty-one million, four hundred fifty-one thousand, one hundred five".