2102202131609 has 2 divisors, whose sum is σ = 2102202131610. Its totient is φ = 2102202131608.

The previous prime is 2102202131537. The next prime is 2102202131611. The reversal of 2102202131609 is 9061312022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2077763688025 + 24438443584 = 1441445^2 + 156328^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102202131609 - 2⁸ = 2102202131353 is a prime.

Together with 2102202131611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2102202131669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051101065804 + 1051101065805.

It is an arithmetic number, because the mean of its divisors is an integer number (1051101065805).

Almost surely, 2^{2102202131609} is an apocalyptic number.

It is an amenable number.

2102202131609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102202131609 is an equidigital number, since it uses as much as digits as its factorization.

2102202131609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 2102202131609 in words is "two trillion, one hundred two billion, two hundred two million, one hundred thirty-one thousand, six hundred nine".