111221202122111 has 16 divisors (see below), whose sum is σ = 114787439873568. Its totient is φ = 107715852816000.

The previous prime is 111221202122101. The next prime is 111221202122113.

It is a happy number.

111221202122111 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 111221202122111 - 2³⁰ = 111220128380287 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 (111221202122113) 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 15 ways as a sum of consecutive naturals, for example, 29613896 + ... + 33157581.

It is an arithmetic number, because the mean of its divisors is an integer number (7174214992098).

Almost surely, 2^{111221202122111} is an apocalyptic number.

111221202122111 is a deficient number, since it is larger than the sum of its proper divisors (3566237751457).

111221202122111 is a wasteful number, since it uses less digits than its factorization.

111221202122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62771962.

The product of its (nonzero) digits is 64, while the sum is 20.

It can be divided in two parts, 11122120 and 2122111, that added together give a palindrome (13244231).

The spelling of 111221202122111 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, one hundred eleven".