111020110021 has 16 divisors (see below), whose sum is σ = 114992027136. Its totient is φ = 107129520576.

The previous prime is 111020109943. The next prime is 111020110027. The reversal of 111020110021 is 120011020111.

It is a cyclic number.

It is not a de Polignac number, because 111020110021 - 2¹¹ = 111020107973 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 (111020110027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924391 + ... + 1037563.

It is an arithmetic number, because the mean of its divisors is an integer number (7187001696).

Almost surely, 2^111020110021 is an apocalyptic number.

It is an amenable number.

111020110021 is a deficient number, since it is larger than the sum of its proper divisors (3971917115).

111020110021 is a wasteful number, since it uses less digits than its factorization.

111020110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113532.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111020110021 its reverse (120011020111), we get a palindrome (231031130132).

The spelling of 111020110021 in words is "one hundred eleven billion, twenty million, one hundred ten thousand, twenty-one".