121478707 has 4 divisors (see below), whose sum is σ = 138832816. Its totient is φ = 104124600.

The previous prime is 121478689. The next prime is 121478713. The reversal of 121478707 is 707874121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 707874121 = 37 ⋅19131733.

It is a cyclic number.

It is not a de Polignac number, because 121478707 - 2¹¹ = 121476659 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121478737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8677044 + ... + 8677057.

It is an arithmetic number, because the mean of its divisors is an integer number (34708204).

Almost surely, 2^121478707 is an apocalyptic number.

121478707 is a deficient number, since it is larger than the sum of its proper divisors (17354109).

121478707 is an equidigital number, since it uses as much as digits as its factorization.

121478707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17354108.

The product of its (nonzero) digits is 21952, while the sum is 37.

The square root of 121478707 is about 11021.7379301088. The cubic root of 121478707 is about 495.2601523365.

The spelling of 121478707 in words is "one hundred twenty-one million, four hundred seventy-eight thousand, seven hundred seven".