20021104811 has 2 divisors, whose sum is σ = 20021104812. Its totient is φ = 20021104810.

The previous prime is 20021104777. The next prime is 20021104841. The reversal of 20021104811 is 11840112002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021104811 - 2³⁴ = 2841235627 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021104841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010552405 + 10010552406.

It is an arithmetic number, because the mean of its divisors is an integer number (10010552406).

Almost surely, 2^20021104811 is an apocalyptic number.

20021104811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021104811 is an equidigital number, since it uses as much as digits as its factorization.

20021104811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20021104811 its reverse (11840112002), we get a palindrome (31861216813).

The spelling of 20021104811 in words is "twenty billion, twenty-one million, one hundred four thousand, eight hundred eleven".