111120211110021 has 16 divisors (see below), whose sum is σ = 151617920103936. Its totient is φ = 72351595307376.

The previous prime is 111120211109993. The next prime is 111120211110067. The reversal of 111120211110021 is 120011112021111.

It is not a de Polignac number, because 111120211110021 - 2¹¹ = 111120211107973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120211110071) 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, 32605395 + ... + 35851808.

It is an arithmetic number, because the mean of its divisors is an integer number (9476120006496).

Almost surely, 2^{111120211110021} is an apocalyptic number.

It is an amenable number.

111120211110021 is a deficient number, since it is larger than the sum of its proper divisors (40497708993915).

111120211110021 is a wasteful number, since it uses less digits than its factorization.

111120211110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68469832.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111120211110021 its reverse (120011112021111), we get a palindrome (231131323131132).

The spelling of 111120211110021 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred eleven million, one hundred ten thousand, twenty-one".