211222110220111 has 8 divisors (see below), whose sum is σ = 211242768772464. Its totient is φ = 211201452443520.

The previous prime is 211222110220097. The next prime is 211222110220123. The reversal of 211222110220111 is 111022011222112.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222110220111 is a prime.

It is a super-2 number, since 2×211222110220111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222110920111) 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, 646545196 + ... + 646871806.

It is an arithmetic number, because the mean of its divisors is an integer number (26405346096558).

Almost surely, 2^{211222110220111} is an apocalyptic number.

211222110220111 is a deficient number, since it is larger than the sum of its proper divisors (20658552353).

211222110220111 is a wasteful number, since it uses less digits than its factorization.

211222110220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387881.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211222110220111 its reverse (111022011222112), we get a palindrome (322244121442223).

The spelling of 211222110220111 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred ten million, two hundred twenty thousand, one hundred eleven".