111122222011021 has 4 divisors (see below), whose sum is σ = 119670085242652. Its totient is φ = 102574358779392.

The previous prime is 111122222011007. The next prime is 111122222011027. The reversal of 111122222011021 is 120110222221111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41128685317225 + 69993536693796 = 6413165^2 + 8366214^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122222011021 - 2¹⁵ = 111122221978253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111122222011021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122222011027) 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, 4273931615796 + ... + 4273931615821.

It is an arithmetic number, because the mean of its divisors is an integer number (29917521310663).

Almost surely, 2^{111122222011021} is an apocalyptic number.

It is an amenable number.

111122222011021 is a deficient number, since it is larger than the sum of its proper divisors (8547863231631).

111122222011021 is an equidigital number, since it uses as much as digits as its factorization.

111122222011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547863231630.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111122222011021 its reverse (120110222221111), we get a palindrome (231232444232132).

The spelling of 111122222011021 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty-two million, eleven thousand, twenty-one".