2120020011209 has 2 divisors, whose sum is σ = 2120020011210. Its totient is φ = 2120020011208.

The previous prime is 2120020011149. The next prime is 2120020011233. The reversal of 2120020011209 is 9021100200212.

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., 1935081309184 + 184938702025 = 1391072^2 + 430045^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120020011209 - 2²⁴ = 2120003233993 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120020011289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060010005604 + 1060010005605.

It is an arithmetic number, because the mean of its divisors is an integer number (1060010005605).

Almost surely, 2^{2120020011209} is an apocalyptic number.

It is an amenable number.

2120020011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120020011209 is an equidigital number, since it uses as much as digits as its factorization.

2120020011209 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2120020011209 in words is "two trillion, one hundred twenty billion, twenty million, eleven thousand, two hundred nine".