111122123201 has 4 divisors (see below), whose sum is σ = 111123248004. Its totient is φ = 111120998400.

The previous prime is 111122123197. The next prime is 111122123221. The reversal of 111122123201 is 102321221111.

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 38909535025 + 72212588176 = 197255^2 + 268724^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122123201 - 2² = 111122123197 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 111122123201.

It is not an unprimeable number, because it can be changed into a prime (111122123221) 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, 398240 + ... + 617121.

It is an arithmetic number, because the mean of its divisors is an integer number (27780812001).

Almost surely, 2^111122123201 is an apocalyptic number.

It is an amenable number.

111122123201 is a deficient number, since it is larger than the sum of its proper divisors (1124803).

111122123201 is a wasteful number, since it uses less digits than its factorization.

111122123201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124802.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111122123201 its reverse (102321221111), we get a palindrome (213443344312).

The spelling of 111122123201 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twenty-three thousand, two hundred one".