2120223201809 has 2 divisors, whose sum is σ = 2120223201810. Its totient is φ = 2120223201808.

The previous prime is 2120223201769. The next prime is 2120223201821. The reversal of 2120223201809 is 9081023220212.

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., 1594158760000 + 526064441809 = 1262600^2 + 725303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120223201809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120223206809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060111600904 + 1060111600905.

It is an arithmetic number, because the mean of its divisors is an integer number (1060111600905).

Almost surely, 2^{2120223201809} is an apocalyptic number.

It is an amenable number.

2120223201809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120223201809 is an equidigital number, since it uses as much as digits as its factorization.

2120223201809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 2120223201809 in words is "two trillion, one hundred twenty billion, two hundred twenty-three million, two hundred one thousand, eight hundred nine".