111220121021111 has 8 divisors (see below), whose sum is σ = 111400214716848. Its totient is φ = 111040082640000.

The previous prime is 111220121021029. The next prime is 111220121021129. The reversal of 111220121021111 is 111120121022111.

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 111220121021111 - 2³⁰ = 111219047279287 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 111220121021111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220121021161) 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, 9803090 + ... + 17847711.

It is an arithmetic number, because the mean of its divisors is an integer number (13925026839606).

Almost surely, 2^{111220121021111} is an apocalyptic number.

111220121021111 is a deficient number, since it is larger than the sum of its proper divisors (180093695737).

111220121021111 is an equidigital number, since it uses as much as digits as its factorization.

111220121021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27657313.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111220121021111 its reverse (111120121022111), we get a palindrome (222340242043222).

The spelling of 111220121021111 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, one hundred eleven".