111210220110021 has 16 divisors (see below), whose sum is σ = 148595354703360. Its totient is φ = 73982627586560.

The previous prime is 111210220110001. The next prime is 111210220110091. The reversal of 111210220110021 is 120011022012111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111210220110021 - 2¹⁰ = 111210220108997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111210220110001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37784401 + ... + 40621193.

It is an arithmetic number, because the mean of its divisors is an integer number (9287209668960).

Almost surely, 2^{111210220110021} is an apocalyptic number.

It is an amenable number.

111210220110021 is a deficient number, since it is larger than the sum of its proper divisors (37385134593339).

111210220110021 is a wasteful number, since it uses less digits than its factorization.

111210220110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864556.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111210220110021 its reverse (120011022012111), we get a palindrome (231221242122132).

The spelling of 111210220110021 in words is "one hundred eleven trillion, two hundred ten billion, two hundred twenty million, one hundred ten thousand, twenty-one".