202112210009 has 2 divisors, whose sum is σ = 202112210010. Its totient is φ = 202112210008.

The previous prime is 202112209973. The next prime is 202112210029. The reversal of 202112210009 is 900012211202.

It is a happy number.

It is an a-pointer prime, because the next prime (202112210029) can be obtained adding 202112210009 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115913011600 + 86199198409 = 340460^2 + 293597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202112210009 is a prime.

It is not a weakly prime, because it can be changed into another prime (202112210029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101056105004 + 101056105005.

It is an arithmetic number, because the mean of its divisors is an integer number (101056105005).

Almost surely, 2^202112210009 is an apocalyptic number.

It is an amenable number.

202112210009 is a deficient number, since it is larger than the sum of its proper divisors (1).

202112210009 is an equidigital number, since it uses as much as digits as its factorization.

202112210009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 202112210009 in words is "two hundred two billion, one hundred twelve million, two hundred ten thousand, nine".