1222212101111 has 4 divisors (see below), whose sum is σ = 1222217537712. Its totient is φ = 1222206664512.

The previous prime is 1222212101081. The next prime is 1222212101161. The reversal of 1222212101111 is 1111012122221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222212101111 - 2³⁸ = 947334194167 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 1222212101111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222212101161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2365850 + ... + 2835783.

It is an arithmetic number, because the mean of its divisors is an integer number (305554384428).

Almost surely, 2^{1222212101111} is an apocalyptic number.

1222212101111 is a deficient number, since it is larger than the sum of its proper divisors (5436601).

1222212101111 is an equidigital number, since it uses as much as digits as its factorization.

1222212101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5436600.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1222212101111 its reverse (1111012122221), we get a palindrome (2333224223332).

The spelling of 1222212101111 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred one thousand, one hundred eleven".