21210012201211 has 2 divisors, whose sum is σ = 21210012201212. Its totient is φ = 21210012201210.

The previous prime is 21210012201193. The next prime is 21210012201223. The reversal of 21210012201211 is 11210221001212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21210012201211 - 2⁴³ = 12413919179003 is a prime.

It is a super-3 number, since 3×21210012201211³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21210012201241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605006100605 + 10605006100606.

It is an arithmetic number, because the mean of its divisors is an integer number (10605006100606).

Almost surely, 2^{21210012201211} is an apocalyptic number.

21210012201211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210012201211 is an equidigital number, since it uses as much as digits as its factorization.

21210012201211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21210012201211 its reverse (11210221001212), we get a palindrome (32420233202423).

The spelling of 21210012201211 in words is "twenty-one trillion, two hundred ten billion, twelve million, two hundred one thousand, two hundred eleven".