1202110122809 has 2 divisors, whose sum is σ = 1202110122810. Its totient is φ = 1202110122808.

The previous prime is 1202110122793. The next prime is 1202110122817. The reversal of 1202110122809 is 9082210112021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1158626196025 + 43483926784 = 1076395^2 + 208528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202110122809 - 2⁴ = 1202110122793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1202110122709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601055061404 + 601055061405.

It is an arithmetic number, because the mean of its divisors is an integer number (601055061405).

Almost surely, 2^{1202110122809} is an apocalyptic number.

It is an amenable number.

1202110122809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202110122809 is an equidigital number, since it uses as much as digits as its factorization.

1202110122809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 1202110122809 in words is "one trillion, two hundred two billion, one hundred ten million, one hundred twenty-two thousand, eight hundred nine".