111222012101 has 4 divisors (see below), whose sum is σ = 111635477100. Its totient is φ = 110808547104.

The previous prime is 111222012059. The next prime is 111222012107. The reversal of 111222012101 is 101210222111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101210222111 = 29 ⋅3490007659.

It can be written as a sum of positive squares in 2 ways, for example, as 10812880225 + 100409131876 = 103985^2 + 316874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111222012101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222012107) 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 3 ways as a sum of consecutive naturals, for example, 206732096 + ... + 206732633.

It is an arithmetic number, because the mean of its divisors is an integer number (27908869275).

Almost surely, 2^111222012101 is an apocalyptic number.

It is an amenable number.

111222012101 is a deficient number, since it is larger than the sum of its proper divisors (413464999).

111222012101 is an equidigital number, since it uses as much as digits as its factorization.

111222012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413464998.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111222012101 its reverse (101210222111), we get a palindrome (212432234212).

It can be divided in two parts, 11122 and 2012101, that multiplied together give a palindrome (22378587322).

The spelling of 111222012101 in words is "one hundred eleven billion, two hundred twenty-two million, twelve thousand, one hundred one".