2001222220609 has 2 divisors, whose sum is σ = 2001222220610. Its totient is φ = 2001222220608.

The previous prime is 2001222220573. The next prime is 2001222220637. The reversal of 2001222220609 is 9060222221002.

It is an a-pointer prime, because the next prime (2001222220637) can be obtained adding 2001222220609 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1699268673600 + 301953547009 = 1303560^2 + 549503^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001222220609 - 2²¹ = 2001220123457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001228220609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000611110304 + 1000611110305.

It is an arithmetic number, because the mean of its divisors is an integer number (1000611110305).

Almost surely, 2^{2001222220609} is an apocalyptic number.

It is an amenable number.

2001222220609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001222220609 is an equidigital number, since it uses as much as digits as its factorization.

2001222220609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 2001222220609 in words is "two trillion, one billion, two hundred twenty-two million, two hundred twenty thousand, six hundred nine".