1222120222111 has 4 divisors (see below), whose sum is σ = 1223326659672. Its totient is φ = 1220913784552.

The previous prime is 1222120222109. The next prime is 1222120222117. The reversal of 1222120222111 is 1112220212221.

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 1222120222111 - 2¹ = 1222120222109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222120222117) 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, 603217261 + ... + 603219286.

It is an arithmetic number, because the mean of its divisors is an integer number (305831664918).

Almost surely, 2^{1222120222111} is an apocalyptic number.

1222120222111 is a deficient number, since it is larger than the sum of its proper divisors (1206437561).

1222120222111 is a wasteful number, since it uses less digits than its factorization.

1222120222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206437560.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1222120222111 its reverse (1112220212221), we get a palindrome (2334340434332).

The spelling of 1222120222111 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, two hundred twenty-two thousand, one hundred eleven".