21110102010211 has 4 divisors (see below), whose sum is σ = 22351872716712. Its totient is φ = 19868331303712.

The previous prime is 21110102010187. The next prime is 21110102010229. The reversal of 21110102010211 is 11201020101112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110102010211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110102010191 and 21110102010200.

It is not an unprimeable number, because it can be changed into a prime (21110102010511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620885353225 + ... + 620885353258.

It is an arithmetic number, because the mean of its divisors is an integer number (5587968179178).

Almost surely, 2^{21110102010211} is an apocalyptic number.

21110102010211 is a deficient number, since it is larger than the sum of its proper divisors (1241770706501).

21110102010211 is a wasteful number, since it uses less digits than its factorization.

21110102010211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241770706500.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110102010211 its reverse (11201020101112), we get a palindrome (32311122111323).

The spelling of 21110102010211 in words is "twenty-one trillion, one hundred ten billion, one hundred two million, ten thousand, two hundred eleven".