121120643 has 8 divisors (see below), whose sum is σ = 138803712. Its totient is φ = 103532616.

The previous prime is 121120639. The next prime is 121120661. The reversal of 121120643 is 346021121.

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 121120643 - 2² = 121120639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121120663) 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 7 ways as a sum of consecutive naturals, for example, 21005 + ... + 26142.

It is an arithmetic number, because the mean of its divisors is an integer number (17350464).

Almost surely, 2^121120643 is an apocalyptic number.

121120643 is a deficient number, since it is larger than the sum of its proper divisors (17683069).

121120643 is an equidigital number, since it uses as much as digits as its factorization.

121120643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47521.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 121120643 is about 11005.4824065099. The cubic root of 121120643 is about 494.7730728704.

Adding to 121120643 its reverse (346021121), we get a palindrome (467141764).

The spelling of 121120643 in words is "one hundred twenty-one million, one hundred twenty thousand, six hundred forty-three".