11920842811 has 2 divisors, whose sum is σ = 11920842812. Its totient is φ = 11920842810.

The previous prime is 11920842767. The next prime is 11920842821. The reversal of 11920842811 is 11824802911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11920842811 - 2²⁵ = 11887288379 is a prime.

It is not a weakly prime, because it can be changed into another prime (11920842821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5960421405 + 5960421406.

It is an arithmetic number, because the mean of its divisors is an integer number (5960421406).

Almost surely, 2^11920842811 is an apocalyptic number.

11920842811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11920842811 is an equidigital number, since it uses as much as digits as its factorization.

11920842811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 37.

The spelling of 11920842811 in words is "eleven billion, nine hundred twenty million, eight hundred forty-two thousand, eight hundred eleven".