10211193809 has 2 divisors, whose sum is σ = 10211193810. Its totient is φ = 10211193808.

The previous prime is 10211193763. The next prime is 10211193841. The reversal of 10211193809 is 90839111201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10080160000 + 131033809 = 100400^2 + 11447^2 .

It is an emirp because it is prime and its reverse (90839111201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10211193809 - 2¹² = 10211189713 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211193409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105596904 + 5105596905.

It is an arithmetic number, because the mean of its divisors is an integer number (5105596905).

Almost surely, 2^10211193809 is an apocalyptic number.

It is an amenable number.

10211193809 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211193809 is an equidigital number, since it uses as much as digits as its factorization.

10211193809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 10211193809 in words is "ten billion, two hundred eleven million, one hundred ninety-three thousand, eight hundred nine".