12122101021209 has 4 divisors (see below), whose sum is σ = 16162801361616. Its totient is φ = 8081400680804.

The previous prime is 12122101021207. The next prime is 12122101021243. The reversal of 12122101021209 is 90212010122121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12122101021209 - 2¹ = 12122101021207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122101021207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020350170199 + ... + 2020350170204.

It is an arithmetic number, because the mean of its divisors is an integer number (4040700340404).

Almost surely, 2^{12122101021209} is an apocalyptic number.

It is an amenable number.

12122101021209 is a deficient number, since it is larger than the sum of its proper divisors (4040700340407).

12122101021209 is an equidigital number, since it uses as much as digits as its factorization.

12122101021209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040700340406.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 12122101021209 in words is "twelve trillion, one hundred twenty-two billion, one hundred one million, twenty-one thousand, two hundred nine".