11112112122201 has 24 divisors (see below), whose sum is σ = 16210497955080. Its totient is φ = 7334388000000.

The previous prime is 11112112122187. The next prime is 11112112122277. The reversal of 11112112122201 is 10222121121111.

It is a happy number.

11112112122201 is a `hidden beast` number, since 11 + 11 + 211 + 212 + 220 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9520162146576 + 1591949975625 = 3085476^2 + 1261725^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11112112122201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11112112127201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20181765 + ... + 20725053.

It is an arithmetic number, because the mean of its divisors is an integer number (675437414795).

Almost surely, 2^{11112112122201} is an apocalyptic number.

It is an amenable number.

11112112122201 is a deficient number, since it is larger than the sum of its proper divisors (5098385832879).

11112112122201 is a wasteful number, since it uses less digits than its factorization.

11112112122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565897 (or 565894 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11112112122201 its reverse (10222121121111), we get a palindrome (21334233243312).

The spelling of 11112112122201 in words is "eleven trillion, one hundred twelve billion, one hundred twelve million, one hundred twenty-two thousand, two hundred one".