111100122220021 has 8 divisors (see below), whose sum is σ = 121278175933824. Its totient is φ = 100935075606720.

The previous prime is 111100122220019. The next prime is 111100122220069. The reversal of 111100122220021 is 120022221001111.

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 111100122220021 - 2¹ = 111100122220019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111100122219977 and 111100122220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100122220421) 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 7 ways as a sum of consecutive naturals, for example, 3251757261 + ... + 3251791426.

It is an arithmetic number, because the mean of its divisors is an integer number (15159771991728).

Almost surely, 2^{111100122220021} is an apocalyptic number.

111100122220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111100122220021 is a deficient number, since it is larger than the sum of its proper divisors (10178053713803).

111100122220021 is a wasteful number, since it uses less digits than its factorization.

111100122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6503550251.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111100122220021 its reverse (120022221001111), we get a palindrome (231122343221132).

The spelling of 111100122220021 in words is "one hundred eleven trillion, one hundred billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".