21222311311 has 2 divisors, whose sum is σ = 21222311312. Its totient is φ = 21222311310.

The previous prime is 21222311293. The next prime is 21222311317. The reversal of 21222311311 is 11311322212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222311311 - 2⁷ = 21222311183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222311317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611155655 + 10611155656.

It is an arithmetic number, because the mean of its divisors is an integer number (10611155656).

Almost surely, 2^21222311311 is an apocalyptic number.

21222311311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222311311 is an equidigital number, since it uses as much as digits as its factorization.

21222311311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

Adding to 21222311311 its reverse (11311322212), we get a palindrome (32533633523).

The spelling of 21222311311 in words is "twenty-one billion, two hundred twenty-two million, three hundred eleven thousand, three hundred eleven".