21120102100211 has 4 divisors (see below), whose sum is σ = 21120155487024. Its totient is φ = 21120048713400.

The previous prime is 21120102100193. The next prime is 21120102100219. The reversal of 21120102100211 is 11200120102112.

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-21120102100211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120102100219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26095535 + ... + 26892696.

It is an arithmetic number, because the mean of its divisors is an integer number (5280038871756).

Almost surely, 2^{21120102100211} is an apocalyptic number.

21120102100211 is a deficient number, since it is larger than the sum of its proper divisors (53386813).

21120102100211 is an equidigital number, since it uses as much as digits as its factorization.

21120102100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53386812.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21120102100211 its reverse (11200120102112), we get a palindrome (32320222202323).

The spelling of 21120102100211 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, one hundred thousand, two hundred eleven".