121647001 has 4 divisors (see below), whose sum is σ = 139025152. Its totient is φ = 104268852.

The previous prime is 121646989. The next prime is 121647037. The reversal of 121647001 is 100746121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100746121 = 7 ⋅14392303.

It is a cyclic number.

It is not a de Polignac number, because 121647001 - 2¹³ = 121638809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121647061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8689065 + ... + 8689078.

It is an arithmetic number, because the mean of its divisors is an integer number (34756288).

Almost surely, 2^121647001 is an apocalyptic number.

It is an amenable number.

121647001 is a deficient number, since it is larger than the sum of its proper divisors (17378151).

121647001 is an equidigital number, since it uses as much as digits as its factorization.

121647001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17378150.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 121647001 is about 11029.3699276069. The cubic root of 121647001 is about 495.4887544062.

The spelling of 121647001 in words is "one hundred twenty-one million, six hundred forty-seven thousand, one".