211222221201111 has 8 divisors (see below), whose sum is σ = 283494725144704. Its totient is φ = 139882265695800.

The previous prime is 211222221201071. The next prime is 211222221201139. The reversal of 211222221201111 is 111102122222112.

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

It is not a de Polignac number, because 211222221201111 - 2⁴¹ = 209023197945559 is a prime.

It is a super-2 number, since 2×211222221201111² (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 (211222221201311) 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 7 ways as a sum of consecutive naturals, for example, 233137109041 + ... + 233137109946.

It is an arithmetic number, because the mean of its divisors is an integer number (35436840643088).

Almost surely, 2^{211222221201111} is an apocalyptic number.

211222221201111 is a deficient number, since it is larger than the sum of its proper divisors (72272503943593).

211222221201111 is a wasteful number, since it uses less digits than its factorization.

211222221201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466274219141.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211222221201111 its reverse (111102122222112), we get a palindrome (322324343423223).

The spelling of 211222221201111 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, one hundred eleven".