21101102221211 has 2 divisors, whose sum is σ = 21101102221212. Its totient is φ = 21101102221210.

The previous prime is 21101102221153. The next prime is 21101102221247. The reversal of 21101102221211 is 11212220110112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101102221211 - 2³⁴ = 21083922352027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21101102221211.

It is not a weakly prime, because it can be changed into another prime (21101102221411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550551110605 + 10550551110606.

It is an arithmetic number, because the mean of its divisors is an integer number (10550551110606).

Almost surely, 2^{21101102221211} is an apocalyptic number.

21101102221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101102221211 is an equidigital number, since it uses as much as digits as its factorization.

21101102221211 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 17.

Adding to 21101102221211 its reverse (11212220110112), we get a palindrome (32313322331323).

The spelling of 21101102221211 in words is "twenty-one trillion, one hundred one billion, one hundred two million, two hundred twenty-one thousand, two hundred eleven".