202122121209 has 8 divisors (see below), whose sum is σ = 272014817760. Its totient is φ = 133488752736.

The previous prime is 202122121189. The next prime is 202122121219. The reversal of 202122121209 is 902121221202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202122121209 - 2⁸ = 202122120953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202122121219) 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, 314831644 + ... + 314832285.

It is an arithmetic number, because the mean of its divisors is an integer number (34001852220).

Almost surely, 2^202122121209 is an apocalyptic number.

It is an amenable number.

202122121209 is a deficient number, since it is larger than the sum of its proper divisors (69892696551).

202122121209 is a wasteful number, since it uses less digits than its factorization.

202122121209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629664039.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 202122121209 in words is "two hundred two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred nine".