202102201109 has 2 divisors, whose sum is σ = 202102201110. Its totient is φ = 202102201108.

The previous prime is 202102201061. The next prime is 202102201117. The reversal of 202102201109 is 901102201202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201681828100 + 420373009 = 449090^2 + 20503^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102201109 - 2²⁴ = 202085423893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202102200109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051100554 + 101051100555.

It is an arithmetic number, because the mean of its divisors is an integer number (101051100555).

Almost surely, 2^202102201109 is an apocalyptic number.

It is an amenable number.

202102201109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102201109 is an equidigital number, since it uses as much as digits as its factorization.

202102201109 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 202102201109 in words is "two hundred two billion, one hundred two million, two hundred one thousand, one hundred nine".