111001000122221 has 4 divisors (see below), whose sum is σ = 121092000133344. Its totient is φ = 100910000111100.

The previous prime is 111001000122151. The next prime is 111001000122223. The reversal of 111001000122221 is 122221000100111.

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 111001000122221 - 2²⁶ = 111000933013357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111001000122196 and 111001000122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001000122223) 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, 5045500005545 + ... + 5045500005566.

It is an arithmetic number, because the mean of its divisors is an integer number (30273000033336).

Almost surely, 2^{111001000122221} is an apocalyptic number.

111001000122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111001000122221 is a deficient number, since it is larger than the sum of its proper divisors (10091000011123).

111001000122221 is a wasteful number, since it uses less digits than its factorization.

111001000122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091000011122.

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

Adding to 111001000122221 its reverse (122221000100111), we get a palindrome (233222000222332).

The spelling of 111001000122221 in words is "one hundred eleven trillion, one billion, one hundred twenty-two thousand, two hundred twenty-one".