21102120012211 has 16 divisors (see below), whose sum is σ = 25090687959040. Its totient is φ = 17366235395040.

The previous prime is 21102120012151. The next prime is 21102120012217. The reversal of 21102120012211 is 11221002120112.

It is not a de Polignac number, because 21102120012211 - 2⁹ = 21102120011699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102120012217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382825956 + ... + 382881073.

It is an arithmetic number, because the mean of its divisors is an integer number (1568167997440).

Almost surely, 2^{21102120012211} is an apocalyptic number.

21102120012211 is a deficient number, since it is larger than the sum of its proper divisors (3988567946829).

21102120012211 is a wasteful number, since it uses less digits than its factorization.

21102120012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765707194.

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

Adding to 21102120012211 its reverse (11221002120112), we get a palindrome (32323122132323).

The spelling of 21102120012211 in words is "twenty-one trillion, one hundred two billion, one hundred twenty million, twelve thousand, two hundred eleven".