21102220120211 has 8 divisors (see below), whose sum is σ = 21565677207360. Its totient is φ = 20639366103168.

The previous prime is 21102220120169. The next prime is 21102220120253. The reversal of 21102220120211 is 11202102220112.

It is an interprime number because it is at equal distance from previous prime (21102220120169) and next prime (21102220120253).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21102220120211 - 2²⁶ = 21102153011347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21102220120211.

It is not an unprimeable number, because it can be changed into a prime (21102220123211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150696776 + ... + 150836741.

It is an arithmetic number, because the mean of its divisors is an integer number (2695709650920).

Almost surely, 2^{21102220120211} is an apocalyptic number.

21102220120211 is a deficient number, since it is larger than the sum of its proper divisors (463457087149).

21102220120211 is a wasteful number, since it uses less digits than its factorization.

21102220120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301535053.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21102220120211 its reverse (11202102220112), we get a palindrome (32304322340323).

The spelling of 21102220120211 in words is "twenty-one trillion, one hundred two billion, two hundred twenty million, one hundred twenty thousand, two hundred eleven".