111222212201 has 4 divisors (see below), whose sum is σ = 112788722304. Its totient is φ = 109655702100.

The previous prime is 111222212191. The next prime is 111222212221. The reversal of 111222212201 is 102212222111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 102212222111 = 23 ⋅4444009657.

It is a cyclic number.

It is not a de Polignac number, because 111222212201 - 2²⁶ = 111155103337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111222212201.

It is not an unprimeable number, because it can be changed into a prime (111222212221) 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, 783254945 + ... + 783255086.

It is an arithmetic number, because the mean of its divisors is an integer number (28197180576).

Almost surely, 2^111222212201 is an apocalyptic number.

It is an amenable number.

111222212201 is a deficient number, since it is larger than the sum of its proper divisors (1566510103).

111222212201 is an equidigital number, since it uses as much as digits as its factorization.

111222212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566510102.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111222212201 its reverse (102212222111), we get a palindrome (213434434312).

The spelling of 111222212201 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred one".