111110121022021 has 16 divisors (see below), whose sum is σ = 121780107360000. Its totient is φ = 100535608442880.

The previous prime is 111110121022001. The next prime is 111110121022027. The reversal of 111110121022021 is 120220121011111.

It is a cyclic number.

It is not a de Polignac number, because 111110121022021 - 2¹¹ = 111110121019973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111110121021986 and 111110121022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111110121022027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12202941 + ... + 19264786.

It is an arithmetic number, because the mean of its divisors is an integer number (7611256710000).

Almost surely, 2^{111110121022021} is an apocalyptic number.

111110121022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111110121022021 is a deficient number, since it is larger than the sum of its proper divisors (10669986337979).

111110121022021 is a wasteful number, since it uses less digits than its factorization.

111110121022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31469244.

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

Adding to 111110121022021 its reverse (120220121011111), we get a palindrome (231330242033132).

It can be divided in two parts, 1111101 and 21022021, that added together give a palindrome (22133122).

The spelling of 111110121022021 in words is "one hundred eleven trillion, one hundred ten billion, one hundred twenty-one million, twenty-two thousand, twenty-one".