111122112022021 has 4 divisors (see below), whose sum is σ = 113218755645132. Its totient is φ = 109025468398912.

The previous prime is 111122112021979. The next prime is 111122112022043. The reversal of 111122112022021 is 120220211221111.

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 70457322180996 + 40664789841025 = 8393886^2 + 6376895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111122112022021 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 111122112022021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122112029021) 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, 1048321811476 + ... + 1048321811581.

It is an arithmetic number, because the mean of its divisors is an integer number (28304688911283).

Almost surely, 2^{111122112022021} is an apocalyptic number.

It is an amenable number.

111122112022021 is a deficient number, since it is larger than the sum of its proper divisors (2096643623111).

111122112022021 is an equidigital number, since it uses as much as digits as its factorization.

111122112022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096643623110.

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

Adding to 111122112022021 its reverse (120220211221111), we get a palindrome (231342323243132).

The spelling of 111122112022021 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred twelve million, twenty-two thousand, twenty-one".