111222212101 has 64 divisors (see below), whose sum is σ = 152091555840. Its totient is φ = 78526506240.

The previous prime is 111222212093. The next prime is 111222212111. The reversal of 111222212101 is 101212222111.

It is not a de Polignac number, because 111222212101 - 2³ = 111222212093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222212111) 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 63 ways as a sum of consecutive naturals, for example, 64550626 + ... + 64552348.

It is an arithmetic number, because the mean of its divisors is an integer number (2376430560).

Almost surely, 2^111222212101 is an apocalyptic number.

111222212101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111222212101 is a deficient number, since it is larger than the sum of its proper divisors (40869343739).

111222212101 is a wasteful number, since it uses less digits than its factorization.

111222212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111222212101 its reverse (101212222111), we get a palindrome (212434434212).

It can be divided in two parts, 111222 and 212101, that added together give a palindrome (323323).

The spelling of 111222212101 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, one hundred one".