20012223811 has 2 divisors, whose sum is σ = 20012223812. Its totient is φ = 20012223810.

The previous prime is 20012223773. The next prime is 20012223827. The reversal of 20012223811 is 11832221002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012223811 - 2²⁹ = 19475352899 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012223871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006111905 + 10006111906.

It is an arithmetic number, because the mean of its divisors is an integer number (10006111906).

Almost surely, 2^20012223811 is an apocalyptic number.

20012223811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012223811 is an equidigital number, since it uses as much as digits as its factorization.

20012223811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20012223811 its reverse (11832221002), we get a palindrome (31844444813).

The spelling of 20012223811 in words is "twenty billion, twelve million, two hundred twenty-three thousand, eight hundred eleven".