21212220210011 has 2 divisors, whose sum is σ = 21212220210012. Its totient is φ = 21212220210010.

The previous prime is 21212220210001. The next prime is 21212220210017. The reversal of 21212220210011 is 11001202221212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212220210011 - 2¹⁴ = 21212220193627 is a prime.

It is a super-2 number, since 2×21212220210011² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21212220210017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606110105005 + 10606110105006.

It is an arithmetic number, because the mean of its divisors is an integer number (10606110105006).

Almost surely, 2^{21212220210011} is an apocalyptic number.

21212220210011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212220210011 is an equidigital number, since it uses as much as digits as its factorization.

21212220210011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21212220210011 its reverse (11001202221212), we get a palindrome (32213422431223).

The spelling of 21212220210011 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty million, two hundred ten thousand, eleven".