111111012212201 has 4 divisors (see below), whose sum is σ = 111112393772100. Its totient is φ = 111109630652304.

The previous prime is 111111012212159. The next prime is 111111012212231. The reversal of 111111012212201 is 102212210111111.

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 55471944306601 + 55639067905600 = 7447949^2 + 7459160^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111012212201 - 2⁴⁶ = 40742268034537 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 111111012212201.

It is not an unprimeable number, because it can be changed into a prime (111111012212231) 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, 690659306 + ... + 690820163.

It is an arithmetic number, because the mean of its divisors is an integer number (27778098443025).

Almost surely, 2^{111111012212201} is an apocalyptic number.

It is an amenable number.

111111012212201 is a deficient number, since it is larger than the sum of its proper divisors (1381559899).

111111012212201 is an equidigital number, since it uses as much as digits as its factorization.

111111012212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381559898.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111111012212201 its reverse (102212210111111), we get a palindrome (213323222323312).

The spelling of 111111012212201 in words is "one hundred eleven trillion, one hundred eleven billion, twelve million, two hundred twelve thousand, two hundred one".