121122221209 has 16 divisors (see below), whose sum is σ = 132906661056. Its totient is φ = 109468072000.

The previous prime is 121122221201. The next prime is 121122221257. The reversal of 121122221209 is 902122221121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121122221209 - 2³ = 121122221201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121122221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715799 + ... + 1784995.

It is an arithmetic number, because the mean of its divisors is an integer number (8306666316).

Almost surely, 2^121122221209 is an apocalyptic number.

It is an amenable number.

121122221209 is a deficient number, since it is larger than the sum of its proper divisors (11784439847).

121122221209 is a wasteful number, since it uses less digits than its factorization.

121122221209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70136.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 121122221209 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred nine".