111122222101 has 4 divisors (see below), whose sum is σ = 121224242304. Its totient is φ = 101020201900.

The previous prime is 111122221999. The next prime is 111122222111. The reversal of 111122222101 is 101222221111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111122222101 - 2¹⁵ = 111122189333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122222111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5051010085 + ... + 5051010106.

It is an arithmetic number, because the mean of its divisors is an integer number (30306060576).

Almost surely, 2^111122222101 is an apocalyptic number.

111122222101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111122222101 is a deficient number, since it is larger than the sum of its proper divisors (10102020203).

111122222101 is a wasteful number, since it uses less digits than its factorization.

111122222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10102020202.

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

Adding to 111122222101 its reverse (101222221111), we get a palindrome (212344443212).

The spelling of 111122222101 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred one".