20121222011209 has 8 divisors (see below), whose sum is σ = 23241625424928. Its totient is φ = 17216018832960.

The previous prime is 20121222011203. The next prime is 20121222011239. The reversal of 20121222011209 is 90211022212102.

It is a happy number.

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 20121222011209 - 2²¹ = 20121219914057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121222011203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53800058667 + ... + 53800059040.

It is an arithmetic number, because the mean of its divisors is an integer number (2905203178116).

Almost surely, 2^{20121222011209} is an apocalyptic number.

It is an amenable number.

20121222011209 is a deficient number, since it is larger than the sum of its proper divisors (3120403413719).

20121222011209 is a wasteful number, since it uses less digits than its factorization.

20121222011209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107600117735.

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

The spelling of 20121222011209 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, two hundred nine".