111221020122111 has 12 divisors (see below), whose sum is σ = 164388691240488. Its totient is φ = 72422989846704.

The previous prime is 111221020122089. The next prime is 111221020122169.

It is a happy number.

111221020122111 is a `hidden beast` number, since 1 + 11 + 221 + 0 + 201 + 221 + 11 = 666.

111221020122111 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 111221020122111 - 2²² = 111221015927807 is a prime.

It is a super-2 number, since 2×111221020122111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221020121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143696408040 + ... + 143696408813.

It is an arithmetic number, because the mean of its divisors is an integer number (13699057603374).

Almost surely, 2^{111221020122111} is an apocalyptic number.

111221020122111 is a deficient number, since it is larger than the sum of its proper divisors (53167671118377).

111221020122111 is a wasteful number, since it uses less digits than its factorization.

111221020122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287392816902 (or 287392816899 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

The spelling of 111221020122111 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty million, one hundred twenty-two thousand, one hundred eleven".