111220120021111 has 8 divisors (see below), whose sum is σ = 113893834247424. Its totient is φ = 108567710291040.

The previous prime is 111220120021099. The next prime is 111220120021147. The reversal of 111220120021111 is 111120021022111.

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 111220120021111 - 2¹⁷ = 111220119890039 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 (111220127021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5326113495 + ... + 5326134376.

It is an arithmetic number, because the mean of its divisors is an integer number (14236729280928).

Almost surely, 2^{111220120021111} is an apocalyptic number.

111220120021111 is a deficient number, since it is larger than the sum of its proper divisors (2673714226313).

111220120021111 is a wasteful number, since it uses less digits than its factorization.

111220120021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10652248121.

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

Adding to 111220120021111 its reverse (111120021022111), we get a palindrome (222340141043222).

The spelling of 111220120021111 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty million, twenty-one thousand, one hundred eleven".