21100013213211 has 6 divisors (see below), whose sum is σ = 30477796863540. Its totient is φ = 14066675475468.

The previous prime is 21100013213141. The next prime is 21100013213311. The reversal of 21100013213211 is 11231231000112.

21100013213211 is a `hidden beast` number, since 21 + 1 + 0 + 0 + 0 + 1 + 321 + 321 + 1 = 666.

It is not a de Polignac number, because 21100013213211 - 2¹¹ = 21100013211163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100013213311) 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 in 5 ways as a sum of consecutive naturals, for example, 1172222956281 + ... + 1172222956298.

It is an arithmetic number, because the mean of its divisors is an integer number (5079632810590).

Almost surely, 2^{21100013213211} is an apocalyptic number.

21100013213211 is a deficient number, since it is larger than the sum of its proper divisors (9377783650329).

21100013213211 is a wasteful number, since it uses less digits than its factorization.

21100013213211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344445912585 (or 2344445912582 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21100013213211 its reverse (11231231000112), we get a palindrome (32331244213323).

The spelling of 21100013213211 in words is "twenty-one trillion, one hundred billion, thirteen million, two hundred thirteen thousand, two hundred eleven".