21212001202211 has 2 divisors, whose sum is σ = 21212001202212. Its totient is φ = 21212001202210.

The previous prime is 21212001202121. The next prime is 21212001202219. The reversal of 21212001202211 is 11220210021212.

Together with previous prime (21212001202121) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212001202211 - 2¹⁰ = 21212001201187 is a prime.

It is a super-2 number, since 2×21212001202211² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21212001202211.

It is not a weakly prime, because it can be changed into another prime (21212001202219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606000601105 + 10606000601106.

It is an arithmetic number, because the mean of its divisors is an integer number (10606000601106).

Almost surely, 2^{21212001202211} is an apocalyptic number.

21212001202211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212001202211 is an equidigital number, since it uses as much as digits as its factorization.

21212001202211 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 21212001202211 its reverse (11220210021212), we get a palindrome (32432211223423).

The spelling of 21212001202211 in words is "twenty-one trillion, two hundred twelve billion, one million, two hundred two thousand, two hundred eleven".