2001232102609 has 2 divisors, whose sum is σ = 2001232102610. Its totient is φ = 2001232102608.

The previous prime is 2001232102607. The next prime is 2001232102691. The reversal of 2001232102609 is 9062012321002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1994512201984 + 6719900625 = 1412272^2 + 81975^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001232102609 - 2¹ = 2001232102607 is a prime.

Together with 2001232102607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2001232102603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000616051304 + 1000616051305.

It is an arithmetic number, because the mean of its divisors is an integer number (1000616051305).

Almost surely, 2^{2001232102609} is an apocalyptic number.

It is an amenable number.

2001232102609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001232102609 is an equidigital number, since it uses as much as digits as its factorization.

2001232102609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 2001232102609 in words is "two trillion, one billion, two hundred thirty-two million, one hundred two thousand, six hundred nine".