1122220211111 has 8 divisors (see below), whose sum is σ = 1160991720480. Its totient is φ = 1083453652512.

The previous prime is 1122220211071. The next prime is 1122220211131. The reversal of 1122220211111 is 1111120222211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122220211111 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 1122220211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122220211131) 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, 773555 + ... + 1686068.

It is an arithmetic number, because the mean of its divisors is an integer number (145123965060).

Almost surely, 2^{1122220211111} is an apocalyptic number.

1122220211111 is a deficient number, since it is larger than the sum of its proper divisors (38771509369).

1122220211111 is a wasteful number, since it uses less digits than its factorization.

1122220211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475385.

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

Adding to 1122220211111 its reverse (1111120222211), we get a palindrome (2233340433322).

It can be divided in two parts, 1122220 and 211111, that added together give a palindrome (1333331).

The spelling of 1122220211111 in words is "one trillion, one hundred twenty-two billion, two hundred twenty million, two hundred eleven thousand, one hundred eleven".