211222100001111 has 16 divisors (see below), whose sum is σ = 286515070396800. Its totient is φ = 138381963511968.

The previous prime is 211222100001109. The next prime is 211222100001181. The reversal of 211222100001111 is 111100001222112.

It is a happy number.

It is not a de Polignac number, because 211222100001111 - 2¹ = 211222100001109 is a prime.

It is a super-2 number, since 2×211222100001111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222100001181) 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 15 ways as a sum of consecutive naturals, for example, 1253920816 + ... + 1254089253.

It is an arithmetic number, because the mean of its divisors is an integer number (17907191899800).

Almost surely, 2^{211222100001111} is an apocalyptic number.

211222100001111 is a deficient number, since it is larger than the sum of its proper divisors (75292970395689).

211222100001111 is a wasteful number, since it uses less digits than its factorization.

211222100001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508010558.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211222100001111 its reverse (111100001222112), we get a palindrome (322322101223223).

The spelling of 211222100001111 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred million, one thousand, one hundred eleven".