1222120111 has 8 divisors (see below), whose sum is σ = 1285300224. Its totient is φ = 1159777080.

The previous prime is 1222120073. The next prime is 1222120129. The reversal of 1222120111 is 1110212221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222120111 - 2¹¹ = 1222118063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222120091 and 1222120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222120411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206275 + ... + 212116.

It is an arithmetic number, because the mean of its divisors is an integer number (160662528).

Almost surely, 2^1222120111 is an apocalyptic number.

1222120111 is a deficient number, since it is larger than the sum of its proper divisors (63180113).

1222120111 is a wasteful number, since it uses less digits than its factorization.

1222120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418541.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1222120111 is about 34958.8345200466. The cubic root of 1222120111 is about 1069.1483341466.

Adding to 1222120111 its reverse (1110212221), we get a palindrome (2332332332).

The spelling of 1222120111 in words is "one billion, two hundred twenty-two million, one hundred twenty thousand, one hundred eleven".