1222100211111 has 16 divisors (see below), whose sum is σ = 1755109275360. Its totient is φ = 751933647360.

The previous prime is 1222100211103. The next prime is 1222100211119. The reversal of 1222100211111 is 1111120012221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1222100211103) and next prime (1222100211119).

It is not a de Polignac number, because 1222100211111 - 2³ = 1222100211103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222100211119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2434806 + ... + 2893523.

It is an arithmetic number, because the mean of its divisors is an integer number (109694329710).

Almost surely, 2^{1222100211111} is an apocalyptic number.

1222100211111 is a deficient number, since it is larger than the sum of its proper divisors (533009064249).

1222100211111 is a wasteful number, since it uses less digits than its factorization.

1222100211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334226.

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

Adding to 1222100211111 its reverse (1111120012221), we get a palindrome (2333220223332).

The spelling of 1222100211111 in words is "one trillion, two hundred twenty-two billion, one hundred million, two hundred eleven thousand, one hundred eleven".