121000012209 has 24 divisors (see below), whose sum is σ = 185089432320. Its totient is φ = 75909026688.

The previous prime is 121000012201. The next prime is 121000012213. The reversal of 121000012209 is 902210000121.

It is not a de Polignac number, because 121000012209 - 2³ = 121000012201 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121000012191 and 121000012200.

It is not an unprimeable number, because it can be changed into a prime (121000012201) 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 23 ways as a sum of consecutive naturals, for example, 910744 + ... + 1035110.

It is an arithmetic number, because the mean of its divisors is an integer number (7712059680).

Almost surely, 2^121000012209 is an apocalyptic number.

It is an amenable number.

121000012209 is a deficient number, since it is larger than the sum of its proper divisors (64089420111).

121000012209 is a wasteful number, since it uses less digits than its factorization.

121000012209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130749 (or 130746 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 121000012209 in words is "one hundred twenty-one billion, twelve thousand, two hundred nine".